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- Mammal
Class of tetrapods
A mammal (from 'breast') is a vertebrate animal of the class Mammalia . Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles and birds, from which their ancestors diverged in the Carboniferous Period over 300 million years ago... Wikipedia
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