Jordan Lake. Oh, it is still hot! The eastern cottontail rabbit, however, has a very neat way to stay cool. Rabbits cannot sweat, so how do they get rid of excess heat? You see those big long ears? If you look carefully you can see the blood vessels coursing through those ears. Those vessels bring the too warm blood up close to the surface of the ears and there the body heat transfers out into the air and the now cooler blood returns to the body. Another way to keep cool in all of this very hot weather.