4.5 pounds of sunlight strike the Earth each day.
27
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
The average temperature at 40,000 feet above sea level is -60 F.
56
Cold water weighs more than hot water.
93
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The only letter not appearing on the Periodic Table is the letter "J".
180