The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
In zero gravity, a candle's flame is round and blue.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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
A cubic yard of air weighs about 2 pounds at sea level.
31