A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Balsa wood is classified as a hard wood!
41
According to studies, men change their minds two to three times more often than women.
72
A cesium atom in an atomic clock beats over nine billion times a second.
43
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199