Did you know that having red hair and blue eyes is the rarest combination in the world? How about the fact that redheads need a larger dose of anesthesia to go under for surgery -- and that they're more resistant to pain blockers?

Not only are they super duper rare (only 1-2% of the world's population) but they get to have thicker hair than the rest of us, and hair that retains its pigment much longer (a.k.a. you'll be gray long before your rouge-haired best friend!).

Watch the video above for more fun facts about having red hair.