Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
Mushrooms are more closely related to humans than they are to plants.
47
The average person will go on a date at least 100 times before they finally marry.
33
On average a woman has 4 sexual partners in her lifetime.
-143
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Your heart will pump about 212 million liters in its lifetime.
26
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515