Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
A person can live without food for about a month, but only about a week without water.
156
Obsessive nose picking is called Rhinotillexomania.
101
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Babies crawl an average of 200m a day.
212