Massive teenage dinosaurs wiped out many smaller species

In a new study led by the University of New Mexico, experts have discovered that massive teenage dinosaurs like T. rex and other carnivores transformed their communities by out-competing smaller animals. The research explains why there were many more gigantic species of dinosaurs than small ones, which is counterintuitive.  The study is the first to treat teenage dinosaurs as their own ecological entity while examining diversity on a community scale.  "Dinosaur communities were like shopping malls on a Saturday afternoon - jam-packed with teenagers," explained study lead …