Reptile Radiator
Dimetrodon, like all reptiles, did not have a constant body temperature. Its body no doubt cooled off overnight. In the morning, Dimetrodon could stand sideways to the sun, absorbing heat through its sail, which enabled it to quickly become active. If the reptile got too hot, it could stand in the shade and radiate heat out through its sail to cool off its body. The ability to adjust its body temperature may have given it an advantage over its prey, which could not adapt so quickly.
Sailed kinMany dinosaurs had similar "radiators," but those dinosaurs might not have been cold-blooded. Spinosaurus had a sail that measured as much as eight feet in height.
