How one molecule is changing the way we view human aging and health.
Ever since the first human saw their reflection in water, we've sought to reverse—or at least hide—the effects of aging. Our efforts over the centuries to thwart aging have led us to some rather scary methods. The ancient Egyptians basically invented cosmetics, developing hair growth serums for men and night creams for women. Some even turned to leeches and crocodile dung as elaborate topical treatments designed to make them appear healthier and younger.