In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The average temperature at 40,000 feet above sea level is -60 F.
56
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Sound travels about 4 times faster in water than in air.
408
The bark of an older redwood tree is fireproof.
65
Pumice is the only rock that floats on water.
14