Pumice is the only rock that floats on water.
14
The average home creates more pollution than does the average car.
33
Most dust particles in your house are made from dead skin!
67
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116