A cubic yard of air weighs about 2 pounds at sea level.
31
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
In zero gravity, a candle's flame is round and blue.
16
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
The average temperature at 40,000 feet above sea level is -60 F.
56
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88