Around six hundred million years ago, our planet almost lost the invisible shield that keeps its surface hospitable. Earth's magnetic field, generated by whirling molten iron deep below our feet, faded until it was so weak it was barely detectable.



At the same moment, oxygen flooded the oceans and <a href="https://www.earth.com/news/nitrogen-was-plentiful-for-early-life-on-earth/" target="_blank" rel="noreferrer noopener">atmosphere</a>, and curious soft-bodied creatures began sliding across the seafloor. The coincidence has fascinated geologists and biologists for decades.



Fresh measurements from ancient crystals now reveal just how close Earth came to a magnetic stall. They also strengthen the suspicion that a waning field set the stage for the rise of complex life. 



The new data trace a dramatic drop in magnetic intensity and help explain why the field later rebounded, saving Earth from becoming a dry, radiation-blasted rock like Mars.



<h2 class="wp-block-heading" id="h-earth-s-ancient-magnetic-field">Earth's ancient magnetic field</h2>



To read the planet’s magnetic diary, researchers collected grains of <a href="https://www.earth.com/news/earths-mantle-may-contain-a-wealth-of-green-metals/" target="_blank" rel="noreferrer noopener">pyroxenite and gabbro</a> from South Africa, Brazil, and Canada.



Each mineral contains microscopic iron needles that froze in alignment with the ambient field when the rocks cooled. 



By reheating single crystals in a carefully shielded furnace, the team coaxed out tiny magnetic signals that record field strength at the time of eruption.



After analyzing hundreds of crystals, <a href="https://www.rochester.edu/" target="_blank" rel="noreferrer noopener">University of Rochester</a> geophysicist John Tarduno and colleagues saw a clear pattern. 



“In general, the field is protective. If we had not had a field early in Earth history, water would have been stripped from the planet by the <a href="https://www.earth.com/news/silent-storms-experts-identify-the-mysterious-source-of-solar-wind/" target="_blank" rel="noreferrer noopener">solar wind</a> (a stream of energized particles flowing from the Sun toward Earth),” Tarduno explained.



“But in the Ediacaran, we had a fascinating period in the development of the deep Earth when processes creating the magnetic field … had become so inefficient after billions of years that the field almost completely collapsed.”



<h2 class="wp-block-heading" id="h-very-weak-magnetic-field">Very weak magnetic field</h2>



Crystals dated to 591 million years ago indicate a magnetic field about 30 times weaker than today - the most feeble long-term value ever measured. 



Follow-up samples show the enfeebled state persisted for at least 26 million years.



Before and after that window, rocks more than 2 billion years old and younger than 565 million years record a field as sturdy as the modern one, revealing just how exceptional the <a href="https://www.earth.com/news/ecosystem-behavior-earth-first-sea-creatures-stirring-water-drove-evolution/" target="_blank" rel="noreferrer noopener">Ediacaran lull</a> was.



During the low-field stretch, solar wind could punch far deeper into the atmosphere. Charged particles stripped away lightweight hydrogen, a process that left relatively heavy oxygen behind. 



The timing lines up with multiple geochemical markers that show a sharp increase in oxygen levels, supporting the idea that the weakened shield helped push Earth past a threshold needed for the development of <a href="https://www.earth.com/news/fossils-capture-a-turning-point-in-the-evolution-of-life/" target="_blank" rel="noreferrer noopener">large, mobile animals</a>.



<h2 class="wp-block-heading" id="h-thinner-armor-richer-air">Thinner armor, richer air</h2>



The atmospheric link also finds support from geobiologist Shuhai Xiao of <a href="https://www.vt.edu/" target="_blank" rel="noreferrer noopener">Virginia Tech</a>. 



“The <a href="https://www.earth.com/earthpedia-articles/earths-magnetic-field-origin-structure-and-impact-on-humanity/" target="_blank" rel="noreferrer noopener">magnetosphere shields the Earth</a> from solar wind, thus holding the atmosphere to the Earth. Thus, a weaker magnetosphere means that lighter gases such as hydrogen would be lost from the Earth’s atmosphere,” Xiao explained to CNN.



As hydrogen escaped, oxygen concentrations rose, allowing metabolism-hungry organisms to branch out.



Tarduno agrees that other processes - such as <a href="https://www.earth.com/news/dark-oxygen-discovery-deep-ocean-no-photosynthesis-baffles-scientists/" target="_blank" rel="noreferrer noopener">photosynthetic microbes</a> - were certainly at work.



“We do not challenge that one or more of these processes were happening concurrently. But the weak field may have allowed oxygenation to cross a threshold, aiding animal radiation (evolution),” he said.



<h2 class="wp-block-heading" id="h-magnetic-field-and-earth-s-core">Magnetic field and Earth's core</h2>



Rock records also solve a puzzle about when <a href="https://www.earth.com/news/earths-inner-core-is-not-solid-it-is-shape-shifting-time-for-textbooks-to-be-rewritten/" target="_blank" rel="noreferrer noopener">Earth’s inner core</a> began to form. Once field strength hit its nadir, it bounced back quickly.



“The observations appear to support the claim that the inner core first nucleated soon after this time, pushing the geodynamo (the mechanism that creates the magnetic field) from a weak, unstable state into a strong, stable dipolar field,” noted Peter Driscoll of the <a href="https://carnegiescience.edu/" target="_blank" rel="noreferrer noopener">Carnegie Institution for Science</a>. 



A solid seed at the center released extra heat, turbocharging convection in the outer core and restoring the magnetic screen.



<h2 class="wp-block-heading" id="h-strange-seafloor-pioneers">Strange seafloor pioneers</h2>



While the field flickered, the <a href="https://www.earth.com/news/earths-first-animals-were-very-picky-about-where-they-lived/" target="_blank" rel="noreferrer noopener">Ediacaran seas</a> hosted life forms unlike anything alive today.



Disk-shaped <a href="https://www.earth.com/news/rewrite-the-textbooks-life-on-earth-did-not-arise-due-to-increased-oxygen-levels/" target="_blank" rel="noreferrer noopener">Dickinsonia</a> spread as wide as 4.6 feet (1.4 meters) across the mud; quilted fronds waved gently in the currents; and slug-like Kimberella scraped microbial mats for food.



These pioneers vanished before the Cambrian period began, around 539 million years ago, but their brief reign proved that multicellular bodies could flourish once oxygen climbed to breathable levels.



<h2 class="wp-block-heading" id="h-what-if-it-happens-again">What if it happens again?</h2>



Not every expert is convinced the magnetic dip directly influenced the course of evolution.



“It is hard for me to evaluate the veracity of this claim because the influence that planetary magnetic fields might have on climate is not very well understood,” Driscoll cautioned. 



Untangling all the variables - solar activity, mantle chemistry, biological innovation - will take years of careful detective work.



For now, the crystal record points to a simple narrative: Earth’s shield weakened, gases escaped, oxygen levels increased, and life took a bold new turn.



By tracing that chain of events, scientists gain insight into how planets and biospheres interact, a lesson that will guide the search for living worlds far beyond our own.



The full study was published in the journal <a href="https://www.nature.com/articles/s43247-024-01360-4" target="_blank" rel="noreferrer noopener">Communications, Earth and Environment</a>.



-----



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Complex life emerged on Earth 591 million years ago, now scientists think they figured out how it happened

Around six hundred million years ago, our planet almost lost the invisible shield that keeps its surface hospitable. Earth's magnetic field, generated by whirling molten iron deep below our feet, faded until it was so weak it was barely detectable. At the same moment, oxygen flooded the oceans and atmosphere, and curious soft-bodied creatures began sliding across the seafloor. The coincidence has fascinated geologists and biologists for decades. Fresh measurements from ancient crystals now reveal just how close Earth came to a magnetic stall. They also strengthen...

In an effort to tackle hidden hunger, a team of researchers led by the <a href="https://www.nottingham.ac.uk/?utm_source=GMB&amp;utm_medium=organic&amp;utm_campaign=MainUP">University of Nottingham</a> analyzed thousands of cereal grains and <a href="https://www.earth.com/news/soil-is-a-source-of-food-contamination/">soils</a> to test their nutritional value. The analysis revealed that the amount of nutrients people are getting from crops is a type of "postcode lottery."

The research is shedding new light on the relationship between soils, crops, and nutrient deficiencies.

"It is important to have good quality evidence on the nutritional quality of diets if we are going to support public health and agriculture policies to improve peoples' health and well-being," said Professor Martin Broadley. "Mapping the quality of diets is an important part of this evidence."

The study was focused on the grain of more than 3,000 cereal crop samples from farmers' fields in Ethiopia and Malawi. The experts found that the amount of the dietary micronutrients calcium, iron, selenium, and zinc in the cereal grain varied substantially by location, with some areas linked to much lower levels of micronutrients. 

While it is known that some crops are more nutritious than others, the soils and landscapes can also predict whether deficiencies are likely in an area. 

Micronutrient deficiencies, also known as hidden hunger, affect more than half of children younger than 5 years of age. These deficiencies are particularly prevalent in areas where access to sufficient food is limited for socioeconomic reasons. 

Hidden hunger is a serious risk to human health, impacting the growth and cognitive development of children. A diet that is lacking in nutritional value also increases the susceptibility to infectious diseases.

The new study suggests that location is fundamentally linked to the quality of diets, with the nutritional value of crops varying by location. Rural households who consume locally sourced food will be affected the most. 

Furthermore, the researchers noted that in many smallholder farming communities, location may be the largest influencing factor in determining the dietary intake of micronutrients.

"Nutritional surveillance work on the quality of staple cereals is an important part of wider public health policies to address micronutrient deficiencies and we hope that this type of work is now adopted in more countries," said Dr. Nalivata. 

"By learning more about how the nutritional quality of cereal grains is linked to soil types and landscapes, as we have in this study, we are now better able to advise farmers how to choose and cultivate more nutritious crops."

The study is published in the journal <a href="https://www.nature.com/">Nature</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nutritional value of crops varies by location

In an effort to tackle hidden hunger, a team of...

Scientists at <a href="https://www.ucdavis.edu/">UC Davis</a> have identified plant genes that can be used to protect tomatoes and other crops from the damaging effects of <a href="https://www.earth.com/news/african-rainforests-are-surprisingly-resilient-to-heat-and-drought/">drought</a>. Discoveries made in this study could ultimately help crops survive the hotter, drier climate that is projected for Earth's future.

Over the last ten years, the research team has been constructing a molecular map of crop roots, which is where the effects of drought are first detected by plants. 

The researchers gained an exceptional understanding of root functions by combining genetic data from different cells of tomatoes grown both indoors and outdoors.

"Frequently, researchers do lab and greenhouse experiments, but farmers grow things in the field, and this data looks at field samples too," said study co-author Professor Neelima Sinha.

The study unveiled the plant genes that control the development of three key things, including the xylem - vessels that transport water and nutrients from the roots all the way up to the shoots. 

"Xylem are very important to shore up plants against drought as well as salt and other stresses," said lead study author Professor Siobhan Brady.

The second key set of genes that have been identified by the team are those that regulate the production of lignin and suberin in an outer layer of the root. Suberin surrounds plant cells in a thick layer, holding in water during drought.

Crops like tomatoes and rice have suberin in their roots, while apples have suberin surrounding their outer cells. No matter where it is found, suberin prevents the plant from losing water. 

"Suberin and lignin are natural forms of drought protection, and now that the genes that encode for them in this very specific layer of cells have been identified, these compounds can be enhanced," said study co-author Professor Julia Bailey-Serres.

"I'm excited we've learned so much about the genes regulating this moisture barrier layer. It is so important for being able to improve drought tolerance for crops."

The meristem is a region of plant tissue at the growing tip of each root. This tissue contains all the cells that make up the root. According to the study, the genes that encode for a plant's meristem are very similar between tomato, rice, and Arabidopsis, a weed-like model plant. 

"It's the region that's going to make the rest of the root, and serves as its stem cell niche," said Professor Bailey-Serres. "It dictates the properties of the roots themselves, such as how big they get. Having knowledge of it can help us develop better root systems."

Professor Brady explained that when farmers are interested in a particular crop, they select plants that have features they can see, such as bigger, more attractive fruits. It is much more difficult for breeders to select plants with properties below ground.

"The 'hidden half' of a plant, below ground, is critical for breeders to consider if they want to grow a plant successfully," said Professor Brady. "Being able to modify the meristem of a plant's roots will help us engineer crops with more desirable properties."

While the current study was focused on only three plants, the researchers believe that the findings can be applied more broadly.

"Tomato and rice are separated by more than 125 million years of evolution, yet we still see similarities between the genes that control key characteristics," said Professor Bailey-Serres. "It's likely these similarities hold true for other crops too."

The study is published in the journal <a href="https://www.cell.com/">Cell</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Plant genes identified that could protect crops from drought

Scientists at UC Davis have identified plant genes that can...

Scientists at the <a href="http://www.leeds.ac.uk/">University of Leeds</a> have tracked <a href="https://www.earth.com/news/deciduous-trees-can-offset-carbon-emissions-from-forest-fires/">trees</a> in 100 different tropical rainforests across six African countries. The study revealed that African rainforests continued to remove carbon from the atmosphere despite the extreme heat and drought of the last major El Niño event.

In 2015 and 2016, African rainforests experienced the strongest drought on record, driven by both El Niño conditions and climate change.

The researchers were surprised to find that the forests still managed to take up 1.1 billion tons of carbon dioxide per year during the El Niño monitoring period. To put this in perspective, this rate is equivalent to three times the carbon dioxide emissions of the UK in 2019.

"We saw no sharp slowdown of tree growth, nor a big rise in tree deaths, as a result of the extreme climatic conditions," said study lead author Dr. Amy Bennett.

"Overall, the uptake of carbon dioxide by these intact rainforests reduced by 36%, but they continued to function as a carbon sink, slowing the rate of climate change."

The study showed that the biggest trees in the forest were largely unaffected, while smaller trees grew less and died more during El Niño. Despite the negative effects, African rainforests continued to function as a carbon sink. The impacts on smaller trees were not enough to offset the long-term increase in overall tree biomass that has been observed in the forests over the last three decades.

"These findings show the value of careful long-term monitoring of tropical forests," said study senior author Professor Simon Lewis. "The baseline data running back to the 1980s allowed us to evaluate how well these rainforests coped with record heat and drought."

Rainforests in Asia and the Amazon did not respond as well to the drought and heat of past extreme weather events. These regions experienced substantially slower tree growth and much greater tree mortality, and the conditions led to a temporary reversal of the tropical forest carbon sink.

"Our results highlight just how important it is to protect African rainforests - they are providing valuable services to us all," said study co-author Professor Bonaventure Sonké. "The resistance of intact African tropical forests to a bit more heat and drought than they have experienced in the past is welcome news. But we still need to cut carbon dioxide emissions fast, as our forests will probably only resist limited further rises in air temperature."

Dr. Bennett noted that African tropical forests play an important role in the global carbon cycle, absorbing 1.7 billion tons of carbon dioxide from the atmosphere each year in the 2000s.

"To discover that they will be able to tolerate the predicted conditions of the near future is an unusual source of optimism in climate change science," said Dr. Bennett.

"Our results provide a further incentive to keep global temperature increases to 1.5 degrees Celsius, as outlined in the Paris Agreement, as these forests look to be able to withstand limited increases in temperature and drought."

The study is published in the <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

African rainforests are surprisingly resilient to heat and drought

Scientists at the University of Leeds have tracked trees in...

More than one-third of the world's food production is threatened by climate change, according to a study from <a href="https://www.aalto.fi/fi">Aalto University</a>. The experts report that at the current rate of greenhouse gas emissions, large farming regions will be pushed into <a href="https://www.earth.com/news/rewilding-the-ocean-will-help-mitigate-impacts-of-climate-change/">climate</a> conditions in which no food is grown today.

"Our research shows that rapid, out-of-control growth of greenhouse gas emissions may, by the end of the century, lead to more than a third of current global food production falling into conditions in which no food is produced today - that is, out of safe climatic space," said study co-author Professor Matti Kummu.

The researchers define 'safe climatic space" as those areas where 95 percent of crop production currently takes place. Food production in these regions rely on a combination of three climate factors: rainfall, temperature, and aridity.

"The good news is that only a fraction of food production would face as-of-yet unseen conditions if we collectively reduce emissions, so that warming would be limited to 1.5 to 2 degrees Celsius," explained Professor Kummu.

Shifts in rainfall and aridity, combined with a warming climate, are particularly threatening to food production in South Asia and the Sahel region of Africa. 

"Food production as we know it developed under a fairly stable climate, during a period of slow warming that followed the last ice age. The continuous growth of greenhouse gas emissions may create new conditions, and food crop and livestock production just won't have enough time to adapt," said study co-author Matias Heino.

The researchers investigated the outcomes associated with two future emissions scenarios - one in which carbon dioxide emissions are cut radically and one in which emissions continue growing unhalted.

The study was focused on how climate change would affect 27 food crops and seven different types of livestock. The experts accounted for the capacity for each region to adapt to changes. 

The analysis revealed that in 52 of the 177 countries studied, including most European countries, food production would remain entirely in the safe climatic space in the future.

By contrast, in many countries that are already vulnerable - such as Benin, Cambodia, Ghana, Guyana and Suriname - up to 95 percent of current food production could fall outside of safe climatic space.

Overall, 20 percent of the world's crop production and 18 percent of global livestock production under threat are located in countries with a low capacity to adapt to change.

"If we let emissions grow, the increase in desert areas is especially troubling because in these conditions barely anything can grow without irrigation. By the end of this century, we could see more than 4 million square kilometres of new desert around the globe," said Professor Kummu.

The study supports the conclusion of a massive collection of scientific studies thatt he world needs urgent action to prevent the potentially catastrophic consequences of climate change. 

"We need to mitigate climate change and, at the same time, boost the resilience of our food systems and societies - we cannot leave the vulnerable behind. Food production must be sustainable," said Heino.

The study is published in the journal <a href="https://www.cell.com/one-earth/home">One Earth</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

One-third of food production threatened by climate change

More than one-third of the world's food production is threatened...

Dinosaur,Model,In,The,Jungle,At,Phu,Kum,Khao,Dinosaur

After the largest mass extinction in Earth's history, herbivores rapidly evolved to eat different types of <a href="https://www.earth.com/news/plant-diversity-will-decline-along-with-rainfall-in-dry-regions/">plants</a>, according to a new study from the <a href="https://www.bristol.ac.uk/">University of Bristol</a>. The researchers discovered that herbivores with powerful jaws to chew tougher plants, including some of the earliest dinosaurs, were the most successful. 

The Permian-Triassic extinction event, also known as the Great Dying, took place about 250 million years ago and wiped out at least 90 percent of all species.  The Triassic Period that followed was a time of great change when many new plants and animals emerged. 

"I wanted to focus on the plant-eaters, including some of the first dinosaurs," said Dr. Suresh Singh. "The main animals in any ecosystem tend to be the herbivores, and we found that they show remarkable evidence of specialization in the turbulent times after the great mass extinction." 

"In fact, the environmental shocks that killed so many species, such as global warming and acid rain, were still returning from time to time, but the survivors were set on exploring new diets."

"We were surprised to be able to identify definite specializations among the herbivores," said Dr. Tom Stubbs. "We call these groups, the ingestion generalists, prehension specialists, durophagous specialists, shearing pulpers, and heavy oral processors; these names reflect the power of their jaws, their teeth, and the kinds of plants they would likely have been eating."

Professor Emily Rayfield noted that it may seem hypothetical to identify the diets of animals that died over 200 million years ago. 

"But we measured hundreds of fossil jaws and compared their shapes with living animals, and we estimated key functional values from the fossil jaws such as mechanical advantage and bite force, measuring the leverage of the jaws and how fast or forcefully they could shut," explained Professor Rayfield.

The investigation was focused on the 80 million years that followed the mass extinction event. 

"We were able to map the evolution of all the functional characters relating to feeding across the evolutionary tree and through time," said Dr. Armin Elsler. 

"We found to our surprise that, during this time, several new groups diversified as herbivores, and they seemed to take over their roles by pushing potential competitors aside, not necessarily by wiping them out."

Plants were also diversifying throughout the Triassic, and certain aspects of the evolution of herbivores can be linked to the availability of new kinds of plant food. 

"One key thing was the expansion of groups that were able to handle tough plant material, with powerful jaws for chopping and chomping," explained Dr.  Singh. 

"This reflects the drying conditions especially in the Late Triassic, when many softer plant groups became less common, and dry-adapted conifers for example, spread worldwide. These changes combined with strictly enforced niche separation drove patterns of extinction as the generalist, hardy herbivores thrived, as other herbivores died out."

"This kind of macroecological analysis represents a huge amount of work," said Professor Mike Benton. "But it sheds real light on key processes at an ecological level and helps explain why some groups died out and were replaced by others such as the first dinosaurs." 

"We can be reasonably certain of the results because we have excellent data on the geological ages of the specimens, their relationships to each other, and the key features of their jaws and teeth that correspond to their ancient diets. What was once quite a speculative kind of project has now become much more analytical and testable."

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Herbivores evolved powerful jaws to survive the Triassic

After the largest mass extinction in Earth's history, herbivores rapidly...

A new study from <a href="https://www.ncsu.edu/">North Carolina State University</a> has revealed that dead <a href="https://www.earth.com/news/deciduous-trees-can-offset-carbon-emissions-from-forest-fires/">trees</a> in coastal wetlands release greenhouse gas emissions in the form of "tree farts." The researchers explained that these emissions must be accounted for when estimating the environmental impact of ghost forests.

For their investigation, the experts compared the quantity and type of greenhouse gas emissions from dead tree snags to emissions released from the soil. The study revealed that while soil generates more emissions than dead trees, the so-called tree farts increase the overall emissions of a ghost forest by about 25 percent.

According to the researchers, the findings show that snags are important for understanding the climate effects associated with the spread of ghost forests.

"Even though these standing dead trees are not emitting as much as the soils, they're still emitting something, and they definitely need to be accounted for," said study lead author Melinda Martinez. "Even the smallest fart counts."

The experts measured carbon dioxide, methane, and nitrous oxide emissions from dead pine and bald cypress snags in five ghost forests on the Albemarle-Pamlico Peninsula in North Carolina. Across this region, ghost forests are rapidly expanding as a result of sea level rise.

"The transition from forest to marsh from these disturbances is happening quickly, and it's leaving behind many dead trees," said Martinez. "We expect these ghost forests will continue to expand as the climate changes."

In each forest, overall average emissions from soils were approximately four times higher than average emissions from snags in both 2018 and 2019. But while snags did not contribute as much, the researchers noted that they did contribute significantly to emissions.

The research lays the foundation for understanding the role that snags are playing in emissions. In particular, the experts want to investigate whether the forests of dead trees are preventing emissions, like corks, or releasing them, like straws.

"We started off this research wondering: Are these snags straws or corks?" said study co-author Professor Marcelo Ardon. "Are they facilitating the release from soils, or are they keeping the gases in? We think that they act as straws, but as a filtered straw. They change those gases, as the gases move through the snags."

The study is published in the journal <a href="https://www.springer.com/journal/10533">Biogeochemistry</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ghost forests release greenhouse gas emissions in "tree farts"

A new study from North Carolina State University has revealed...

In a new study, scientists have identified special transporters that horseradish flea beetles use to accumulate high amounts of <a href="https://www.earth.com/news/plant-diversity-will-decline-along-with-rainfall-in-dry-regions/">plant</a> toxins in their bodies to use for their own defense.

As they feed on and take up nutrients from their host plants, horseradish flea beetles also ingest mustard oil glucosides, which are the characteristic defense compounds of horseradish and other brassicaceous plants. The beetles use these compounds to turn themselves into a "mustard oil bomb" to deter predators.

A team of experts at the <a href="https://www.ice.mpg.de/">Max Planck Institute for Chemical Ecology</a> has discovered that the beetles are equipped with special transporters in the excretory system that prevent the excretion of mustard oil glucosides. 

Many types of insects that feed on toxic plants have the ability to acquire defense compounds through their diet.

"The horseradish flea beetle belongs to an economically important group of insects, because several Phyllotreta species are crop pests," said study first author Zhi-Ling Yang.

"This beetle, which can accumulate vast amounts of host plant glucosinolates, regulates the levels and composition of glucosinolates in the body at least partially by excretion. This suggested that Phyllotreta armoraciae possesses very efficient transport and storage mechanisms, which we wanted to uncover."

The team was led by Franziska Beran, head of the Sequestration and Detoxification in Insects Research Group at the Max Planck Institute. 

In a previous study, the researchers uncovered how horseradish flea beetles use glucosinolates from their host plant to defend against a predatory ladybug. For the current study, the experts set out to identify glucosinolate transporters within the beetles.

"The search for these transporters was literally like looking for a needle in a haystack," said Beran. "We found 1,401 putative membrane transporters in the gut and excretory system of this beetle. Narrowing down our search to transporters that are specific for the horseradish flea beetle helped us to identify a group of glucosinolate-specific transporters."

The glucosinolate transporters are located in the excretory system, or the Malpighian tubules. In insects, the function of the Malpighian tubules is similar to that of the kidneys in vertebrates. 

"We silenced the expression of several transporter genes that are localized in the Malpighian tubules and found that the beetles excreted more glucosinolates than a control group of beetles with normal gene expression. Because of the higher excretion rate, the levels of defense compounds in the beetle body went down," explained Yang. 

"Our study is the first to identify transporters in the Malpighian tubules that enable an insect to accumulate plant defense compounds."

According to the researchers, their study demonstrates that sequestration is a complex process - much more than just the uptake of plant metabolites into the animal's body. The insect must adapt its entire physiology to use plant defense compounds. 

"Sequestration is probably one of the most complex adaptations that herbivorous insects have evolved. It most certainly also contributes to the evolutionary success of insects that specialize in certain host plants, such as the horseradish flea beetle," said Beran.

Going forward, the team plans to explore other transporters involved in sequestration. The researchers also plan to investigate which natural enemies of the horseradish flea beetle the glucosinolates provide protection from. A better understanding of pests like the horseradish flea beetle could ultimately lead to improved strategies for their control.

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Horseradish flea beetles take up plant toxins for their own defense

In a new study, scientists have identified special transporters that...

Plant diversity will suffer in places where water becomes scarce, according to a new study from the <a href="https://www.ufz.de/index.php?en=33573">Helmholtz Centre for Environmental Research</a> (UFZ). The experts have demonstrated, for the first time, that plant biodiversity is particularly sensitive to precipitation in dry regions.

It is difficult to predict how climate change will affect Earth's ecosystems, including biodiversity. For example, scientific studies worldwide have investigated how individual species and their communities will react to changing precipitation conditions, yet with no clear answers. 

"These studies use different methods and are located in different regions of the world," said study first author Dr. Lotte Korell. "And these studies yield contradictory results in many cases." 

The UFZ team set out to derive a general understanding from the data collected worldwide, focusing on how an increase or decrease in precipitation affects the plant diversity of terrestrial ecosystems. Overall, the analysis included the results of 72 field experiments published in 23 studies.

The researchers found a clear trend that in dry regions, changes in precipitation have a much greater effect on plant diversity than in wetter regions.

About 40 percent of Earth's land surface is made up of dry ecosystems. For some of these dry regions, climate models predict increasing rainfall, but the water shortage is likely to worsen in most of them.

The study predicts that plant diversity will increase in places where it becomes wetter. However, few regions will likely benefit, considering that drylands are expected to expand - leading to a noticeable decline in plant diversity. 

"Although the plants there have adapted to the challenges of their habitats over long periods of time, at some point, even the most resilient survivor reaches its limits," said Korell.

With every species that dries up and can no longer germinate, plant diversity is reduced. The researchers warn that changes in plant diversity will have consequences for the ecosystems, and also for people living in the affected regions. 

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Plant diversity will decline along with rainfall in dry regions

Plant diversity will suffer in places where water becomes scarce,...

A new study from the <a href="https://english.cas.cn/">Chinese Academy of Sciences</a> has revealed that a tropical rainforest in southeast China contained a remarkable level of <a href="https://www.earth.com/news/biodiversity-supports-healthier-seafood/">biodiversity</a> during the Middle Miocene 14.7 million years ago. 

The experts analyzed material preserved in amber and sedimentary rocks to describe the wildlife of the ancient seasonal rainforest in Fujian Province.

"During the Mid-Miocene Climatic Optimum, global temperatures were similar to predicted temperatures for the coming century," explained the researchers. "Limited megathermal paleoclimatic and fossil data are known from this period, despite its potential as an analog for future climate conditions."

Led by Professor Bo Wang and Professor Gongle Shi, an international team of experts collected approximately 25,000 fossil-containing amber samples and about 5,000 fossil plants to study Zhangpu biota.

The leaves of 78 different broadleaf trees show that tropical seasonal rainforests once extended farther north than today, which provides new insight into what changes could take place as a result of future warming.

The amber from Zhangpu contains diverse, well-preserved fossils of arthropods, fungi, snails, flowering plants, and even feathers.

According to the researchers, the arthropod fossils include more than 250 families of spiders, mites, and millipedes, and at least 200 families of insects in 20 orders. This extremely high diversity makes the Zhangpu collection one of the four richest records preserved in amber in the world. 

The insects contained in Zhangpu amber include many ants, bees, lacewings, stick insects, termites, and grasshoppers that are today restricted to tropical Southeast Asia and New Guinea.

"The most unexpected finding is that the high diversity of ants and springtails all belong to living genera," said Professor Wang. "In addition, the vast majority of previously identified insects in Zhangpu amber, such as bark lice, grasshoppers, beetles, and bees, also belong to living genera."

The results suggest that Asian rainforest insect communities have remained stable since the middle Miocene, at least 15 million years ago.

"Our results not only highlight the role of tropical rainforests acting as evolutionary museums for biodiversity at the generic level but also suggest that the MMCO probably strongly shaped the East Asian biota via the northern expansion of the megathermal rainforest biome," wrote the study authors. "The Zhangpu biota provides an ideal snapshot for biodiversity redistribution during global warming."

The study is published in the journal <a href="https://advances.sciencemag.org/">Science Advances</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Extraordinary biodiversity found in ancient Asian rainforest

A new study from the Chinese Academy of Sciences has...

Scientists at the <a href="https://www.cam.ac.uk/">University of Cambridge</a> are describing how a plant's ability to tell time could be exploited for more sustainable food production. According to the experts, circadian clock genes could be targeted in agriculture and crop breeding for higher yields.

"Circadian biology might have translational impact in crop science through the practice of 'chronoculture,' in which the daily timing of agronomic interventions and the genetic basis of circadian rhythms are targets for crop improvements and reduced inputs," wrote the study authors.

Just like humans, plants have an internal clock that detects daily rhythms in the surrounding environment. Now that there are genetic tools to modify this circadian system, the clock should be exploited in agriculture, explained the researchers.

"We live on a rotating planet, and that has a huge impact on our biology - and on the biology of plants," said study senior author Professor Alex Webb. "We've discovered that plants grow much better when their internal clock is matched to the environment they grow in."

The circadian clock plays an important role in regulating photosynthesis, flowering time, and many other functions that affect plant yield. Crop breeders could target tie circadian clock genes to gain control of these functions.

For example, the researchers said the simplest and easiest approach would be to use knowledge of a crop's internal clock to apply water, herbicides, or pesticides at the most effective time of day or night. 

"We know from lab experiments that watering plants or applying pesticides can be more effective at certain times of day, meaning farmers could use less of these resources. This is a simple win that could save money and contribute to sustainability."

Professor Webb said that indoor "vertical farming" could also be improved using chronoculture. Using this approach, crops like leafy greens are grown under highly controlled light and temperature conditions that can be very energy intensive. By genetically modifying the plants' circadian clock, the most efficient lighting and heating cycles could be identified. 

"In vertical farming, chronoculture could give total control over the crop," explained Professor Webb. "We could breed specific crop plants with internal clocks suited to growing indoors, and optimize the light and temperature cycles for them."

According to Professor Webb, there are many opportunities for chronoculture to make food production more sustainable. The specifics would be different for every location and crop, and more research is needed. 

The study is published in the journal <a href="https://www.sciencemag.org/">Science</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Plant circadian systems may be key to sustainable farming

Scientists at the University of Cambridge are describing how a...

In a new study from the <a href="https://www.southampton.ac.uk/">University of Southampton</a>, experts have discovered that the rate at which plant life changes throughout an <a href="https://www.earth.com/news/few-of-earths-wilderness-areas-remain-ecologically-intact/">ecosystem</a> increases significantly after human settlement. The most dramatic changes were found in locations that have been settled within the last 1,500 years.

The researchers analyzed fossilized pollen samples dating back 5,000 years, which were extracted from sediments on 27 islands. 

Through their analysis, the experts were able to determine the composition of each island's vegetation, including how plant life changed from the oldest to the most recent pollen samples.

"Islands provide the ideal environment to measure human impact as most were settled in the past 3,000 years when climates were similar to today's conditions," said study lead author Dr. Sandra Nogué.

"Knowing when the settlers arrived on an island means that scientists can study how the composition of its ecosystem changed in the years before and after."

For 24 out of 27 islands, there was a consistent pattern in which human arrival accelerated the turnover of vegetation by an average factor of eleven. 

The most rapid changes in plant life occurred on islands that were settled more recently, such as the Galápagos, which were first inhabited during the 16th century. Islands that were settled more than 1,500 years ago saw a slower rate of change.

"This difference in change could mean that the islands populated earlier were more resilient to human arrival but it is more likely that the land-use practices, technology and introduced species brought in by the later settlers were more transformative than those of the earlier settlers," explained Dr. Nogué.

The vegetation trends were observed across a range of locations and climates. For example, islands like Iceland had results similar to tropical islands like Tenerife.

There are a number of natural factors that drive ecosystem changes, including earthquakes, volcanic eruptions, extreme weather, and changing sea levels. However, the researchers found that human disturbance surpasses all of these events, and anthropogenic changes are often irreversible. 

With this in mind, the study authors advise that conservation strategies must account for the long-term impact of humans and the degree to which ecological changes today differ from prehuman times.

"Whilst it is unrealistic to expect ecosystems to return to their pre-settlement conditions, our findings may help to inform targeted restoration efforts and provide greater understanding into the islands' responsiveness to change," said Dr. Nogué.

The study is published in the journal <a href="https://www.sciencemag.org/">Science</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How much have humans impacted the world's plant life?

In a new study from the University of Southampton, experts...

Flowers that bloom in the forest in early spring are key to bumble <a href="https://www.earth.com/news/the-social-life-of-bees-was-driven-by-maternal-insincts/">bee</a> survival, according to a new study from the <a href="https://illinois.edu/">University of Illinois Urbana-Champaign</a>.

Bumble bee populations have been declining for more than a decade across North America, primarily due to habitat loss. 

While efforts to support wild bees in the Midwest often focus on the native flowers found in prairies, the new study suggests that bumble bees largely depend on springtime flowers in forests. The experts found that these flowers are steadily declining.

The researchers explained that the scarcity of early season flowers in forests - a primary food source for bumble bees at this time of year - likely endangers the queen bees' ability to start their nesting season and survive until other floral resources become available.

"We went through long-term vegetation data from 262 random sites across Illinois, most of them privately owned," said study co-author David Zaya. The vegetation data was collected through the Critical Trends Assessment Program, which began in 1997 at the Illinois Natural History Survey.

"We filtered our data to look at two subsets of plants: those used by bumble bees generally, and those thought to be preferred by the endangered rusty patched bumble bee, Bombus affinis," said study lead author John Mola. "We then looked at how the abundance and richness of these bumble bee food sources either increased, decreased or stayed the same since 1997."

The team also used historical records to map the availability of floral resources throughout the year for each habitat type: forest, grassland and wetland. 

"We found that bumble bee food-plant cover has increased within Illinois grasslands by about 7% since 1997," said Mola. "This is great because it suggests that restoration or management actions by landowners is succeeding."

Over the same time period, however, satellite data revealed that total acreage devoted to grassland in the state shrank by about 7.5 percent. "It may not matter much that the typical grassland is better if there's less of it," said Mola.

The study showed that the richness of floral resources in grasslands increased, but there was an opposite trend in forested areas. Since 1997, food plants for bees in forests have declined by three to four percent.

"The biggest finding of this study was that forest plants that bloom in spring appear to be declining, and the timing of those flowers matches up almost perfectly with when queens are out and foraging," said Zaya. "We can't say for sure, but if declining food is contributing to bumble bee declines, it is most likely related to when the queens are trying to establish nests."

The abundance of forest flowers is known to be influenced by deer and invasive shrubs. Meanwhile, climate change is altering the flowering times for many plants, which could deprive bees of food at a critical time. 

"The forest is a really important habitat for bees early in the season that often gets overlooked in pollinator conservation planning," said Mola. "This has me thinking very carefully about the role of forests in bumble bee conservation."

The study is published in the <a href="https://besjournals.onlinelibrary.wiley.com/journal/13652664">Journal of Applied Ecology</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Forest flowers are critical for the survival of bumble bees

Flowers that bloom in the forest in early spring are...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Flu viruses are more flexible than expected

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Detecting mercury contamination with the tap of a finger

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Santiago, Chile in South America

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Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Interactive map of the universe includes 200,000 galaxies

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The rapid retreat of the Columbia Glacier

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The Pyrenees Mountains in southwest Europe

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Earth,Like,Exoplanet,3d,Render

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Two distant planets may be "water worlds"

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

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Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The history of Mars is much more complex than we thought

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Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Cavefish are healthy despite their sedentary lifestyle

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites capture the world's biggest and fastest waves

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