The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Sound travels fifteen times faster through steel than through air.
134
In zero gravity, a candle's flame is round and blue.
16
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Liquid TIDE laundry detergent glows under a blacklight.
96
The earth is approx. 6,588,000,000,000,000,000 tons.
175
4.5 pounds of sunlight strike the Earth each day.
27