Two studies show negligible rates of aging in some types of turtles and other cold-blooded creatures, but that doesn’t mean they’re immortal.

Endothermy was widespread among both avian and non-avian dinosaurs, a study suggests, so the metabolic strategy is unlikely to account for birds’ survival through the mass extinction event that wiped out their dinosaur cousins.

As dinosaurs got smaller, their metabolism increased, paving the way for bird evolution.

Researchers confirm the unprecedented endothermic abilities of a South American reptile.

The leading argument for dinosaurs being cold-blooded is overturned as a nearly identical bone structure is found in mammals.