Pumice is the only rock that floats on water.
14
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
A cesium atom in an atomic clock beats over nine billion times a second.
43
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels about 4 times faster in water than in air.
408
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1