According to studies, men change their minds two to three times more often than women.
72
One ragweed plant can release as many as one billion grains of pollen!
51
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
For every gallon of sea water, you get more than a quarter pound of salt.
45
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108