Pumice is the only rock that floats on water.
14
Most dust particles in your house come from dead skin.
48
In zero gravity, a candle's flame is round and blue.
16
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Hot water can freeze faster than cold water.
181
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Research indicates that plants grow healthier when they are stroked.
173
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155