Sep 29, 2014 11:50 AM EDT
Ancient Tooth Reveals Reptilian Predator Attack Millions of Years Ago
About 210 million years ago, dog-sized dinosaurs hid from the predators at the top of the food chain: reptilian predators called phytosaurs and rauisuchids. Now, scientists have found that these predators may have interacted with each other far more often than previously thought.