The right side of your cerebellum controls coordination on the right side of your body; the left side of your cerebellum controls coordination on the left. Diseases that damage the spinal cord and peripheral nerves that connect your cerebellum to your muscles also can cause ataxia. Ataxia causes include: Head trauma. Damage to your brain or spinal cord from a blow to your head, such as might occur in a car accident can cause acute cerebellar ataxia, which comes on suddenly. Stroke. When the blood supply to a part of your brain is interrupted or severely reduced, depriving brain tissue of oxygen and nutrients, brain cells die.
A polar bear has one of the best noses in the entire world and are well known to have an incredible sense of smell. Polar bears have been seen walking in a straight line for 32km (20 miles) to food, with only their nose to guide them. Polar bears have also sniffed out a seal ten football fields away that was hidden under 1m (3') of ice.
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.lack bears can be found as far south as central Mexico and as far north as northern Alaska and most of Canada. In the United States black bears are common in the east, along the west coast, in the Rocky Mountains and parts of Alaska.