Babies crawl an average of 200m a day.
212
The average sperm cell swims at 8 inches per hour.
4
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
You can't tickle yourself.
29
Enamel is hardest substance in the human body.
61
Gorillas can catch human colds and other illnesses.
205
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Poor eyesight (myopia) is associated with higher IQ.
232