One cubic foot of gold weighs more than 1,200 pounds!
78
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Hot water can freeze faster than cold water.
181
A cesium atom in an atomic clock beats over nine billion times a second.
43
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Nylon is made from coal and petroleum.
42
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Your brain is 80% water.
525