Indoor pollution is 10 times more toxic than outdoor pollution.
62
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The average temperature at 40,000 feet above sea level is -60 F.
56
Liquid TIDE laundry detergent glows under a blacklight.
96
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5