Dinosaurs may not have been the slow, sunbathing reptiles researchers used to think. In fact, they may have been warm-blooded, new research suggests. The researchers studied the "growth lines" on ...

Add Yahoo as a preferred source to see more of our stories on Google. When it comes to animals, alligators are likely among the toughest in the world — and they’ve got the reputation to prove it.

We humans can rely on our internal body heat to help keep us warm. But what can cold-blooded animals do when faced with the threat of freezing? Here are three creatures that have come up with ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DALLAS (AP) — Scientists once thought of ...