When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Pumice is the only rock that floats on water.
14
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
According to studies, men change their minds two to three times more often than women.
72
Aluminum used to be more valuable than gold!
84
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Sound travels fifteen times faster through steel than through air.
134