It may have originated "after an environmental crisis caused by volcanically induced global warming," a researcher told ...

Scientists once thought of dinosaurs as sluggish, cold-blooded creatures. Then research suggested that some could control ...

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 ...

Steven Spielberg-helmed epic blockbuster Jurassic Park, on beholding a living dinosaur (Brachiosaurus) for the first time on ...

In the early 20th century it was thought that dinosaurs were slow-moving creatures that relied on heat from the sun to ...

Scientists once thought of dinosaurs as sluggish, cold-blooded creatures. Then research suggested that some could control ...

During the Mesozoic Era, which lasted from 230 to 66 million years ago, proto-dinosaurs known as dinosauromorphs began to ...

DALLAS (AP) — 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 ...

A new study suggests that the first warm-blooded dinosaurs may have roamed Earth about 180 million years ago DALLAS -- Scientists once thought of dinosaurs as sluggish, cold-blooded creatures.

A new study suggests that the first warm-blooded dinosaurs may have roamed Earth about 180 million years ago DALLAS -- Scientists once thought of dinosaurs as sluggish, cold-blooded creatures.