Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
The average person's skin weighs twice as much as their brain.
131
On average a woman has 4 sexual partners in her lifetime.
-143
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Gorillas can catch human colds and other illnesses.
205
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23