Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Pumice is the only rock that floats on water.
14
The bark of an older redwood tree is fireproof.
65
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
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
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
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155