Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
A cesium atom in an atomic clock beats over nine billion times a second.
43
Pumice is the only rock that floats on water.
14
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65