Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
In zero gravity, a candle's flame is round and blue.
16
German chemists made a replica of a trophy the size of one molecule.
68
Sound at the right vibration can bore holes through a solid object.
134
Cold water weighs more than hot water.
93
Pumice is the only rock that floats on water.
14
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21