Bear bones hint at osteoporosis treatment New Scientist

Hibernating bears have a unique ability to stop their bones from degenerating during long periods of inactivity, a finding that is stimulating the search for new treatments for osteoporosis. In humans, rapid bone loss is the inevitable consequence of a lack of physical activity from whatever cause, maybe enforced rest or even space flight. Bone production decreases at such times, while the rate at which bone breaks down increases.