Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
The average person's skin weighs twice as much as their brain.
131
Babies crawl an average of 200m a day.
212
There are about 255 babies born worldwide every minute.
46
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
The average sperm cell swims at 8 inches per hour.
4