Were dinosaurs warm-blooded like birds and mammals or cold-blooded like reptiles? It’s one of paleontology’s oldest questions, and gleaning the answer matters because it illuminates how the ...

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 ...

(CNN) — Were dinosaurs warm-blooded like birds and mammals or cold-blooded like reptiles? It’s one of paleontology’s oldest questions, and gleaning the answer matters because it illuminates how the ...

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, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Were dinosaurs warm ...

(CNN) — Were dinosaurs warm-blooded like birds and mammals or cold-blooded like reptiles? It’s one of paleontology’s oldest questions, and gleaning the answer matters because it illuminates how the ...

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 ...

This illustration provided by the University of Vigo and University College London, depicts a dromaeosaur incubating its eggs as snow falls. (Davide Bonadonna/University of Vigo/University College ...