The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
The average sperm cell swims at 8 inches per hour.
76
Contrary to popular beliefs, chocolate does not cause acne.
63
Kissing an infection-free partner is good for your teeth!
141
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
On average, there's 100 billion neurons in the human brain.
83