Pumice is the only rock that floats on water.
14
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The force of a suction cup is calculated using F=AP.
15
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The average home creates more pollution than does the average car.
33
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61