Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The force of a suction cup is calculated using F=AP.
15
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Billions of neutrinos pass unnoticed through your body every second.
6
One ragweed plant can release as many as one billion grains of pollen!
51
For every gallon of sea water, you get more than a quarter pound of salt.
45