Dinosaurs Started Out Hot, Then Some of Them Turned Cold - The New York Times

Scientists directly measured the metabolic rate of extinct animals, which revealed that some giant dinosaurs became coldblooded.

Paleontologists have long wrangled with the question of dinosaur metabolisms whether they ran hot, like modern birds and mammals do, or resembled the slower metabolisms of modern reptiles. In a surpr… [+1488 chars]

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