Bipolar disorder is a chronic mental illness that causes dramatic shifts in a personâs mood, energy and ability to think clearly. People with bipolar have high and low moods, known as mania and depression, which differ from the typical ups and downs most people experience.
Polar bears are the largest of the three bears found in North America. They range from about seven hundred pounds up to about fifteen hundred pounds. Not only are they the largest bear found in North America they are also the most dangerous to humans.
The grizzly bear is a sub-species of the brown bear, also known as the Silvertip Bear. The grizzly bears live in the uplands of western North America, and each female bear produces a litter of young roughly every other year.Grizzly bears can often be seen to congregate together around streams in the salmon season to get the best catch.he grizzly bears live in the uplands of western North America, and each female bear produces a litter of young roughly every other year.