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 evolved to be warm-blooded 180 million years ago, generating their own body heat to withstand chilly temperatures, according to research published in the journal Current Biology Wednesday, May 15, 2024. – Scientists once thought of dinosaurs as sluggish, cold-blooded creatures.
To estimate the origin of the first warm-blooded dinosaurs, researchers analyzed over 1,000 fossils, climate models and dinosaurs’ family trees. They found that two major groups of dinosaurs — which include Tyrannosaurus rex, velociraptors and relatives of triceratops — migrated to chillier areas during the Early Jurassic period, indicating they may have developed the ability to stay warm. A third crop of dinosaurs, which includes brontosaurs, stuck to warmer areas.
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