Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The force of a suction cup is calculated using F=AP.
15
Nylon is made from coal and petroleum.
42
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Research indicates that plants grow healthier when they are stroked.
173
Aluminum used to be more valuable than gold!
84