A single speck of dust is half way in size between a subatomic particle and the Earth.
15
For every gallon of sea water, you get more than a quarter pound of salt.
45
Balsa wood is classified as a hard wood!
41
A cubic yard of air weighs about 2 pounds at sea level.
31
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51