Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Aluminum used to be more valuable than gold!
84
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In zero gravity, a candle's flame is round and blue.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5