The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Liquid TIDE laundry detergent glows under a blacklight.
96
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
In zero gravity, a candle's flame is round and blue.
16
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Each day, up to 150 species of life become extinct.
-23
Nylon is made from coal and petroleum.
42
Iron weighs more after it rusts.
68