The grizzly bear (Ursus arctos horribilis)

Grizzly bears are known to break down car and house doors like there's nothing to it. They are one of the strongest land animals. Grizzly bears have massive bodies, can grow as tall as 8 feet, and weigh 900 pounds.

A grizzly bear preys on big animals like cattle, caribou, and black bears. It also feeds on fish, berries, fruits, nuts, and roots. Grizzly bears routinely lift huge rocks and logs out of their way in search of food. They are not good tree climbers, but they run fast, covering 35 miles in one hour.

In 2006, researchers at Montana State University experimented to test the strength of grizzly bears. They found that one grizzly bear had the strength of 2 to 5 humans. Sam the bear easily lifted a 700 pounds dumpster can and, with one paw, turned over a 675-pound stone.