Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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A 'jiffy' is an actual unit of time for 1/100th of a second!
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For every gallon of sea water, you get more than a quarter pound of salt.
45
Pure water (H2O) does not conduct electricity on its own.
46
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
At room temperature, the average air molecule travels at the speed of a rifle bullet.
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