People belongs to the group of animals called mammals, Mammals are animals whose babies are born live rather than hatched from eggs. All mammal babies can drink milk from their mother’s body. Cats, dogs, horses, and whales are mammals too. But human beings are different in some important ways.

Most mammals move on all four feet, but people walk upright. Our hipbones are specially shaped to help us keep our balance. People have thumbs that can graps things. Unlike other animals, people can survive alsmost anywhere in the world.

People often keep other animals as pets. If you take good care of your pets, they can be some of your best friends.