There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
There are more bacteria in your mouth than there are people in the world.
60
Human teeth are almost as hard as rocks!
47
Chewing gum boosts your brain power.
285
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
In one day, adult lungs move about 10,000 litres of air.
11
The smallest human penis ever recorded was just 5/8 of an inch long!
77