Each day, up to 150 species of life become extinct.
-23
Pumice is the only rock that floats on water.
14
A cesium atom in an atomic clock beats over nine billion times a second.
43
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Sound travels fifteen times faster through steel than through air.
134
For every gallon of sea water, you get more than a quarter pound of salt.
45