The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Most dust particles in your house are made from dead skin!
67
Hot water can freeze faster than cold water.
181
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
One barrel of petroleum holds 42 gallons.
20
Diamonds can be shattered with a hammer.
-104
Iron weighs more after it rusts.
16
Brass doorknobs automatically disinfect themselves in about 8 hours.
18