Before the mid-1960s, it was widely believed that all dinosaurs were cold-blooded, slow-moving animals. But in the summer of 1964, a team of paleontologists led by John Ostrom discovered Deinonychus, ...

Where they lived: Dinosaur fossils have been found on every continent, including Antarctica. What they ate: Some ate plants, while others ate animals, including other dinosaurs. How big they were: The ...

Imagine the sound of a dinosaur roaring... Super loud, right? Wrong... It turns out the giant prehistoric creatures almost certainly didn't roar. You might be surprised to hear that some scientists ...