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Class of animals scientifically know as the Mammalia. They are primarily characterized by the presence of mammary glands in the female which produce [[milk]] to feed their young.
Class of animals scientifically known as the Mammalia. They are primarily characterized by the presence of mammary glands in the female which produce [[milk]] to feed their young.
The first true mammals appeared in the early [[Jurassic]].
The first true mammals appeared in the early [[Jurassic]].