Were Dinosaurs Warm-Blooded Or Cold-Blooded? Neither.

Were dinosaurs warm-blooded? Cold-blooded? The answer is neither. The evidence is locked in three completely different places. Bone growth rings, T. rex tooth chemistry, and fossils from polar Alaska all point to the same third category of animal that biology didn't have a name for until recently: mesothermy. This is how scientists actually figured out what a Tyrannosaurus rex was doing on the inside. And why every bird alive today is a dinosaur that finished a climb the others had already started. Bone Evidence — evidence-driven explainers about how we actually know what we know about dinosaurs. Subscribe. Every video, we dig another fact straight out of the rock. 0:00 The Impossible Dinosaur 0:35 Why It Matters 1:00 The third answer 1:15 Clue 1 — The Bones 2:45 Clue 2 — The Teeth 3:45 Clue 3 — The Polar Fossils 4:45 Mesothermy #dinosaurs #paleontology #trex #science