Polar bears are in danger of extinction in the future if globalwarming continues, as their habitat, Arctic sea ice, is shrinkingevery year, making it difficult for bears to have enough food tolast through the lengthening summers.With a population of nearly 25,000, the polar bear is not in dangerof extinction now.
1 In general, anything that is good for your heart is great for your brain. 2  Aerobic exercise is great for body and brain: not only does it improve brain function, but it also acts as a first aid kit on damaged brain cells.
The results show aerobic exercises appear to benefit cholesterol the most, by lowering LDL by 5 to 10% and raising HDL cholesterol by 3 to 6%. Water exercises, such as swimming, water walking, and participating in water games, can also produce similar results in your cholesterol profile as aerobic exercise.