In zero gravity, a candle's flame is round and blue.
16
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Most dust particles in your house come from dead skin.
48
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65