Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
A cubic yard of air weighs about 2 pounds at sea level.
31
Nearly 50% of the world's scientists are assigned to military projects.
71