The story of life on Earth Today’s Video of the Day from the European Space Agency introduces a new book which investigates the origin of life on Earth.
The Enigma of Life discusses evidence of life on other planets, and explores how life possibly evolved on our own planet. Scientists believe that life on Earth began in the ocean, approximately 4 billion years ago. And in fact, it was only about 500 million years ago that life emerged from the ocean onto the land. Scientists came to know about the earliest forms of life on our planet from the fossils found among aged and preserved rocks. The oldest of these minerals and the fossils embedded in them are said to be 3.5 billion years old. The best examples of these are the Apex chert rocks , found in western Australia.
The Archaea may be the oldest life forms on earth. They are prokaryotes. It is believed that the archaea may be the oldest life forms on earth, and that the bacteria and eukaryotes have evolved from them and with them, at least in part. The story of life on Earth as shown above in video shows The diversification of life. Life began on Earth at least 3.5 billion years ago. Since then, it’s diversified in an amazing way! Learn about important events in the history of living organism on Earth, up to and including the appearance of humans.
The book is available for download as a high-resolution file that can be found here: http://m.esa.int/About_Us/Exhibitions/The_Enigma_of_Life.
By Chrissy Sexton, Earth.com Staff Writer
Video Credit : European Space Agency