20 Laws About How Our Bodies Work

IF WE NEVER CUT OUR HAIR, IT WILL CONTINUE TO GROW

Don’t worry—if you leave your hair to grow without ever cutting it, you won’t end up looking like Rapunzel. Most hairs on our head stop growing after around three years, whereas body hair tends to stop growing after around three weeks.

After that, they stay on our bodies before falling out and being replaced by new hair.