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.
Aerobic exercise stimulates the growth of new neurons, also known as neurogenesis through the release of brain-derived neurotopic factors. Endurance exercises release Irisin, a hormone linked to improved cognitive function, fat loss and overall health.
Regular aerobic exercise can bring remarkable changes not just to your body, your metabolism, and your heart, but also to your spirits, reports the February 2011 issue of Harvard Men's Health Watch.Aerobic exercise is the key for your head, just as it is for your heart.egular aerobic exercise can bring remarkable changes not just to your body, your metabolism, and your heart, but also to your spirits, reports the February 2011 issue of Harvard Men's Health Watch.