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
Scientists in Germany have developed a candy that doesn't cause cavities.
11
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The bark of an older redwood tree is fireproof.
65
Neanderthal man had a brain capacity 100cc larger than modern man's.
50