Sound travels fifteen times faster through steel than through air.
134
Pumice is the only rock that floats on water.
14
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Your brain is 80% water.
525
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18