Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Nylon is made from coal and petroleum.
42
Sound at the right vibration can bore holes through a solid object.
134
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Scientists aren't sure what color dinosaurs were.
312
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65