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 ...

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 ...

Dinosaurs sit at the crossroads between reptiles and birds, leading scientists to debate whether they were warm- or cold-blooded. A new study may have found the answer for different groups of ...

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For decades, paleontologists have debated whether dinosaurs were warm-blooded, like modern mammals and birds, or cold-blooded, like modern reptiles. Knowing whether dinosaurs were warm- or ...

WASHINGTON (Reuters) - The hot question of whether dinosaurs were warm-blooded like birds and mammals or cold blooded like reptiles, fish and amphibians finally has a good answer. Dinosaurs, for eons ...

An 1897 painting by Charles R. Knight depicting two dinosaurs called “Laelaps” in an energetic fight, suggesting they may have been warm-blooded. Charles R. Knight The dinosaurs looked ready to tear ...

WASHINGTON, May 14 (Reuters) - Move over, mammals and birds, and make room for a fish called the opah in the warm-blooded club. Researchers said in the journal Science on Thursday that this deepwater ...