It takes about 20 seconds for a red blood cell to circle the whole body.
102
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The heart pumps about 1 million barrels of blood during an average lifetime!
30
You have no sense of smell when you're sleeping!
72
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Contrary to popular beliefs, chocolate does not cause acne.
63
In Japan, condoms are commonly sold 'door to door'!
54