Indoor pollution is 10 times more toxic than outdoor pollution.
62
Iron weighs more after it rusts.
16
According to studies, men change their minds two to three times more often than women.
72
The average temperature at 40,000 feet above sea level is -60 F.
56
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
One barrel of petroleum holds 42 gallons.
20
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11