Pumice is the only rock that floats on water.
14
In zero gravity, a candle's flame is round and blue.
16
Hot water can freeze faster than cold water.
181
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
Sound travels fifteen times faster through steel than through air.
134
A cubic yard of air weighs about 2 pounds at sea level.
31
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155