On average a woman has 4 sexual partners in her lifetime.
-143
Early American humans hunted car-size armadillos and used their shells for houses.
12
Poor eyesight (myopia) is associated with higher IQ.
232
The average person's skin weighs twice as much as their brain.
131
Our brains have a negativity bias and will remember bad memories more than good ones.
15
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
By weight, Bone is five times stronger than steel.
417