In zero gravity, a candle's flame is round and blue.
16
Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
Aluminum used to be more valuable than gold!
84
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A ball of glass will bounce higher than a ball made of rubber.
73
Nearly 50% of the world's scientists are assigned to military projects.
71