The human brain doesn't stop developing until about 25 years old.
102
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
In one day, adult lungs move about 10,000 litres of air.
11
The human brain uses approximately as much energy as a 10 watt light bulb.
120
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Your heart will pump about 212 million liters in its lifetime.
26
There are about 1,400 different species of bacteria in your belly button.
10