The bark of an older redwood tree is fireproof.
65
Sound at the right vibration can bore holes through a solid object.
134
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
In zero gravity, a candle's flame is round and blue.
16
Iron weighs more after it rusts.
68
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51