Brass doorknobs automatically disinfect themselves in about 8 hours.
18
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Iron weighs more after it rusts.
16
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
German chemists made a replica of a trophy the size of one molecule.
68
The sun is 330,330 times larger than the earth.
75
No matter how cold it gets, gasoline will not freeze.
107