One cubic foot of gold weighs more than 1,200 pounds!
78
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51