For more than 100 years, researchers assumed that dinosaurs were like giant lizards: sluggish reptiles that spent most of their day basking in the sun. This image changed when we started to realize ...

DALLASDALLAS — Scientists once thought of dinosaurs as sluggish, cold-blooded creatures. Then research suggested that some could control their body temperature, but when and how that shift came about ...

Birds, the last surviving dinosaurs, are warm-blooded. But scientists have long debated whether other dinosaurs were also warm-blooded like birds or were cold-blooded like reptiles. Now, in a new ...

DALLAS — Scientists once thought of dinosaurs as sluggish, cold-blooded creatures. Then research suggested that some could control their body temperature, but when and how that shift came about ...

The coiled channels deep within the ears of fossilized and modern animals reveals that mammals became warm-blooded 233 million years ago. By Kate Baggaley Published Jul 20, 2022 11:09 AM EDT Get the ...

This is an archived article and the information in the article may be outdated.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

This illustration provided by the University of Vigo and University College London, depicts a dromaeosaur incubating its eggs as snow falls. The raptor, along with other select dinosaurs, may have ...