What is a Mammal?

animals environment

A mammal is a class of animals that comprises the biggest species on earth, including humans. There are 5,400 mammal species, most of which live on land, excluding a few species such as dolphins, whales, and manatees. A mammal can be recognized by a series of unique characteristics, which include:

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Written by Diana Bocco
Last Modified: 28 October 2009

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