Imagine smearing animal fat on your head. It’s pretty gross. But if you were living in Ancient Greek and suffering from baldness, you might have thought differently. Back then, fat along with other human excretions like feces, menstrual blood, and urine, were used to treat a variety of illness. And animal fat, said to promote hair growth, was considered the Rogaine of its time. Um, I think I’d rather be bald. How about you?