One third of the electricity produced on earth is used to power electric light bulbs!
75
Sound travels fifteen times faster through steel than through air.
134
Aluminum used to be more valuable than gold!
84
Pumice is the only rock that floats on water.
14
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116