In zero gravity, a candle's flame is round and blue.
16
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The average home creates more pollution than does the average car.
33
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The force of a suction cup is calculated using F=AP.
15
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Indoor pollution is 10 times more toxic than outdoor pollution.
62