Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
German chemists made a replica of a trophy the size of one molecule.
68
The average home creates more pollution than does the average car.
33
Diamonds can be shattered with a hammer.
-104
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In zero gravity, a candle's flame is round and blue.
16