These Facts About The Human Body Will Leave You Staring At The Mirror In Awe

The Lip Twitch Is A Carryover From Our Hunter-Gatherer Days

Photo credit: Michael Ochs Archives / Getty Images

When you notice someone twitch up the corners of their mouth when they get mad, it’s not a coincidence. Lip twitching stems from our primitive days when we would bare our teeth and growl at an aggressor.

In humans, lip twitching is a sign that humans can still have a wild side when they’re threatened or angry.