In one day, adult lungs move about 10,000 litres of air.
11
Gorillas can catch human colds and other illnesses.
205
We share 70% of our DNA with a slug.
218
One human hair can support 3 ounces.
191
If the human eye was a digital camera, it would have 576 megapixels.
25
The human brain is more active during sleep than during the day.
28
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Enamel is hardest substance in the human body.
61