The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The bark of an older redwood tree is fireproof.
65
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44