Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
One barrel of petroleum holds 42 gallons.
20
Scientists aren't sure what color dinosaurs were.
312
Each day, up to 150 species of life become extinct.
-23
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
German chemists made a replica of a trophy the size of one molecule.
68