In zero gravity, a candle's flame is round and blue.
16
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
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
One third of the electricity produced on earth is used to power electric light bulbs!
75
Pumice is the only rock that floats on water.
14
Research indicates that plants grow healthier when they are stroked.
173
Hot water can freeze faster than cold water.
181