Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Research indicates that plants grow healthier when they are stroked.
173
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
In zero gravity, a candle's flame is round and blue.
16
A cubic yard of air weighs about 2 pounds at sea level.
31
Each day, up to 150 species of life become extinct.
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