Your thumb is about the same size as your nose.
124
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
In one day, adult lungs move about 10,000 litres of air.
11
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Poor eyesight (myopia) is associated with higher IQ.
232
We share 70% of our DNA with a slug.
218
Yawns are more contagious among people with closer relationships.
163