For example,  when we are watching a scary movie and we can feel very scared even  though we are not even in danger. Even when we thing we have seen  something, for example, a ghost, when we really haven't. So the  answer is: the human brain is the most powerful thing on the earth. Christopher Gerstle.
The grizzly bear is a North American subspecies of the brown bear that once roamed the Great Plains.oday, only about 1,000 grizzlies remain in the continental U.S. Identifiable by its distinctive hump and the grayish, or grizzled, tips of its fur, the mighty grizzly bear has a terrific sense of smell and can run at speeds of up to 30 miles per hour.
Answer by Bob Smith. Confidence votes 18. Grizzly bears actually get their common name, Grizzly, from their fur coloration. Their brown fur has grey, or grizzled tips, which is unique to that subspecies of brown bear.olar Bear's fur gives them camouflage in the cold arctic. It also keeps them warm in the coldness of the arctic. That's what the Polar Bear's fur does for them, it keeps them â¦ warm and gives them camouflage!