Space became a place we study aging
Since the first astronauts spent time in space, scientists have known that space travel affects the human body in strange ways. Muscle and bone mass decrease; telomeres, the protective end caps on chromosomes, shorten; and the risk of conditions usually associated with old age, such as cancers, cataracts and cardiovascular disease, ticks up. Why the human body should decline faster in space is still largely a mystery, but one that…

