The average temperature at 40,000 feet above sea level is -60 F.
56
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Sound at the right vibration can bore holes through a solid object.
134
One cubic foot of gold weighs more than 1,200 pounds!
78
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51