Hair Whorl

Well, you might have already heard about this one. Blue eyes are widely regarded as beautiful, and they’re as rare as they are desirable: only 8% of the world population was born with blue eyes, and most live in (or descend from people who used to live in) the northern European regions near the Baltic Sea.

What you may not know is that, according to a 2008 study shared by Science Daily, blue eyes may have one single common ancestor! All it took was for one person to have a HERC2 gene mutation about 10,000 years ago for blue eyes to become a modern-day standard of beauty.