Mammals

We can look at living things, and we can put them into groups. One group is called mammals.

Mammals all have fur or hair. Their fur or hair can keep them warm. It covers some or all parts of their bodies.

Most of their babies are born alive. They are like little copies of their parents. They look just like them.

Some other mammals live on land. People are mammals. They have a lot of hair on the top of their heads. Dogs and cats are mammals. They have fur all over their bodies. Rabbits and zebras are mammals, too. They also have fur all over their bodies.

Other mammals live in the water. Whales and dolphins live in the ocean. They do not have long fur or hair. Their skin is smooth, but they are still mammals.

Some of them live in and out of the water. Sea lions do this. They have very short fur. They sit in the sun during the day. They also swim in the water much of the day and at night.