Liquid TIDE laundry detergent glows under a blacklight.
96
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
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A cesium atom in an atomic clock beats over nine billion times a second.
43
The average temperature at 40,000 feet above sea level is -60 F.
56