Bears emerged about 20-25 million years ago in Eurasia. They are found in Europe, Asia, North and South America, and can survive in cold snowy lands.
Bears are usually very big. The largest bears are the brown bears and polar bears. The smallest is the red panda which weighs only 6 pounds. The only bears that eat meat are polar bears. American black bear’s diet consists of berries, nuts, and fish. Sloth bears eat insects. Brown bears in North America normally eat salmon.
Bears are going extinct because of habitat loss and over hunting. And all but two bear species are endangered.
Bears are different in a lot of ways including where they live, their diet, and their bodies.
[Source: The Encyclopedia of Mammals]