Enamel is hardest substance in the human body.
61
Banging your head against a wall uses 150 calories an hour.
57
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
Most lipstick contains fish scales.
37
Only 1% of bacteria cause disease in humans!
2
Only 1% of bacteria cause disease.
45
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
A fetus develops fingerprints at eighteen weeks!
32