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
Babies crawl an average of 200m a day.
212
The human brain doesn't stop developing until about 25 years old.
102
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118