The Side Effects of Chemotherapy on the Body. Chemotherapy drugs are powerful enough to kill rapidly growing cancer cells, but they also can harm perfectly healthy cells, causing side effects throughout the body.
The fastest bear is the Black Bear, followed by the Brown Bear, and the Polar Bear. In short, the larger the bear the slower it is. Keep in mind that even the slowest bear can still move it out at about 30 mph. The Brown Bear can run approximately 40 mph. Bears can even run sideways; still beating the fastest human runner.
Polar bears were once thought to be aimless wanderers, but scientists now believe that, like other members of the bear family, many of them have distinct territories, or home ranges. After leaving their mothers, young polar bears may travel more than 1,000 kilometers / 600 miles to establish their own territory. It appears that the size of a polar bear's range is determined by the amount of available food. Bears living in areas with an abundance of ice and seals have smaller home ranges. A satellite-tracked polar bear surprised researchers with a 3,000 mile / 4,800 km trek.