Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Liquid TIDE laundry detergent glows under a blacklight.
96
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Sound travels about 4 times faster in water than in air.
408
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One barrel of petroleum holds 42 gallons.
20
Scientists in Germany have developed a candy that doesn't cause cavities.
11