Summary: A global study of vertebrates reveals that body temperature is the key driver behind brain size evolution.

You may not know this, but the warm and/or cold nature of dinosaurs is ... hotly contested. A study last year put dinosaurs solidly in between cold-blooded reptiles and warm-blooded modern mammals, ...

Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold. As a rule, ...

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 ...

This is an archived article and the information in the article may be outdated.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 ...

When it comes to animals, alligators are likely among the toughest in the world — and they’ve got the reputation to prove it. Tough as they are, though, the cold-blooded reptiles are not immune to ...