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.
Female polar bears in the Hudson Bay area spend remarkable periods of time fasting, the longest known of any mammal species. This fasting period before denning and in dens averages about 180-186 days. In Hudson Bay, pregnant females can successfully fast for as long as 240 days.