The average temperature at 40,000 feet above sea level is -60 F.
56
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
One cubic foot of gold weighs more than 1,200 pounds!
78
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Nylon is made from coal and petroleum.
42
A 'jiffy' is an actual unit of time for 1/100th of a second!
66