The average person's skin weighs twice as much as their brain.
131
Your thumb is about the same size as your nose.
124
Your heart will pump about 212 million liters in its lifetime.
26
In one day, adult lungs move about 10,000 litres of air.
11
The human brain doesn't stop developing until about 25 years old.
102
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17