20 fascinating facts about hair: why baldness is super-masculine – and a pubic bush could be a ‘cheating detector’

Judy Wearing has spent much of her life studying our follicles. She explains how our armpits betray our emotions, why some gentlemen really do prefer blondes and the reason we evolved to have eyebrows As a PhD student at Oxford studying mating behaviour, Judy Wearing was suddenly struck by a…