Encyclopaedia of Mammals

Mammals are a lade of endothermic amniotes distinguished from the reptiles and the birds by the possession of hair there middle ear bones, mammary glands in females, and a neo-cortex. The mammalian brain regulates body temperature and the circulatory system including the four-chambered heart. The mammals include the largest animals on the planet and some other whales, as well as some of the most i...