The average temperature at 40,000 feet above sea level is -60 F.
56
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Iron weighs more after it rusts.
16
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sound travels fifteen times faster through steel than through air.
134
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57