Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Hot water can freeze faster than cold water.
181
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Scientists aren't sure what color dinosaurs were.
312
One cubic foot of gold weighs more than 1,200 pounds!
78
Neanderthal man had a brain capacity 100cc larger than modern man's.
50