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There are three types: marsupials, placentals, and monotremes. So what kind of mammal is Tim? And what three things do all mammals have in common?

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Mammals range in size from the vast blue whale to tiny rodents. One of the six basic animal groups,mammals live in the sea, in the tropics, in the desert, and even in Antarctica. Different as they are from one another, however, mammals have a number of important physical and behavioral characteristics in common.

Mammals Display a High Level of Parental Care

One major difference between mammals and other major vertebrate families such as amphibians, reptiles, and fish is that newborns require at least some parental attention in order to thrive. That said, however, some mammal babies are more helpless than others: a human newborn would die without close parental care, while many plant-eating animals (like horses and giraffes) are capable of walking and foraging immediately after birth.

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Do You Know These Basic Facts About Mammals?

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Mammals range in size from the vast blue whale to tiny rodents. One of the six basic animal groups,mammals live in the sea, in the tropics, in the desert, and even in Antarctica. Different as they are from one another, however, mammals have a number of important physical and behavioral characteristics in common.

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Amazing Facts about Mammals - Science With Kids

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Mammals - videos, photos and facts | Arkive

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Most popular mammals. View videos and photos of 50 of the most popular mammals in nature. Learn more about their biology, threats and conservation.

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Mammals: Learn about animals and what makes one a mammal.

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Learn what is a mammal and what makes it different from other animals. Types, largest, smallest, and fastest mammals.

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Your destination for news, pictures, facts, and videos about mammals.