Only 1% of bacteria cause disease in humans!
2
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
A fetus develops fingerprints at eighteen weeks!
32
Enamel is hardest substance in the human body.
61
The average sperm cell swims at 8 inches per hour.
4
One quarter of the human brain is used to control the eyes.
43
Human teeth are almost as hard as rocks!
47
Smokers get ten times more wrinkles than non-smokers.
171