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.
As of July 4, 2014, the total population of the United States was at 318,881,992 people, as reported by the United States Census Bureau. The United States is the third most populous country in the world, with China leading at 1,361,512,535, and India coming in second place with 1,251,695,584 people.