Pumice is the only rock that floats on water.
14
In zero gravity, a candle's flame is round and blue.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Aluminum used to be more valuable than gold!
84
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The earth is approx. 6,588,000,000,000,000,000 tons.
175