Amazing Facts About the Human Body You Were Never Taught in School

Natural redheads need more novocaine!

via: Getty

Natural redheads require increased doses of anesthesia, due to some connection with the mutated melanocortin-1 receptor. I’m a natural redhead myself, and developed a fear of dentists because I’d always feel what they were doing!

Eventually, I had an issue that couldn’t be ignored and had to find a new dentist. At my first visit, he took one look at me, and said: “You’re a real redhead, huh?” “Yup.” “(Hygienist), get me 4x the novocaine!” I knew I’d found my man, and he’s been treating me ever since… also shed my fears since dental work is much less unpleasant when you’re actually numb before they start.

LollyHutzenklutz

Evolution is absolutely wild:

via: Getty

There’s a small fishing village/tribe in Asia where the fisherman have evolved to be able to hold their breath for around 10 minutes while hunting underwater.

Timmelyo