Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Cold water weighs more than hot water.
93
Scientists aren't sure what color dinosaurs were.
312
Out of all the senses, smell is most closely linked to memory.
146
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61