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
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The average temperature at 40,000 feet above sea level is -60 F.
56
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One 75-watt bulb gives more light than three 25-watt bulbs.
57
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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