The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Nearly 50% of the world's scientists are assigned to military projects.
71
Scientists aren't sure what color dinosaurs were.
312
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Neanderthal man had a brain capacity 100cc larger than modern man's.
50