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
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
Pumice is the only rock that floats on water.
14
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Nylon is made from coal and petroleum.
42
If the chemical sodium is dropped into water it will immediately and violently explode.
67