T. rex and its close relatives were warm-blooded like modern birds

Dinosaur metabolisms were diverse; some lineages were cold-blooded like their lizard cousins, while others were warm-blooded like their avian relatives alive today.

T. rex and its close relatives were warm-blooded like modern birds
Dinosaur metabolisms were diverse; some lineages were cold-blooded like their lizard cousins, while others were warm-blooded like their avian relatives alive today.