The average temperature at 40,000 feet above sea level is -60 F.
56
Most dust particles in your house come from dead skin.
48
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
One barrel of petroleum holds 42 gallons.
20
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
A cesium atom in an atomic clock beats over nine billion times a second.
43