For two decades, a group of scientists looked at more than 4,000 subjects and found that men who were bald when they joined the study were more likely to develop prostrate cancer than men who kept their hair. The researchers couldn’t be sure what explained the link, though one researcher suspected that baldness was a cue for old age, causing those men to perceive themselves as older, perhaps speeding up the aging process. More recent studies are showing similar results, suggesting that mental attitudes might reverse some of the ravages of old age. So is age nothing more than a mind-set? See here how the outlook you have on your age could be altering the way your body ages.