In zero gravity, a candle's flame is round and blue.
16
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A cesium atom in an atomic clock beats over nine billion times a second.
43
Cold water weighs more than hot water.
93
Most dust particles in your house are made from dead skin!
67
For every gallon of sea water, you get more than a quarter pound of salt.
45
Aluminum used to be more valuable than gold!
84
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75