title: On the origin of endothermy in mammals.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001833:Body Temperature Regulation; D002980:Climate; D004734:Energy Metabolism; D006197:Hair; D008322:Mammals / Q000502:physiology*; D008660:Metabolism; D010101:Oxygen Consumption; D010163:Paleontology; D012104:Reptiles; D012768:Shivering; D014714:Vertebrates