The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The average sperm cell swims at 8 inches per hour.
4
Our brains have a negativity bias and will remember bad memories more than good ones.
15
The world's shortest man measures only 21.5 inches.
73
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Mushrooms are more closely related to humans than they are to plants.
47
There are about 255 babies born worldwide every minute.
46
Your heart will pump about 212 million liters in its lifetime.
26