Pumice is the only rock that floats on water.
14
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
German chemists made a replica of a trophy the size of one molecule.
68
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
For every gallon of sea water, you get more than a quarter pound of salt.
45