Cold water weighs more than hot water.
93
Nylon is made from coal and petroleum.
42
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
In zero gravity, a candle's flame is round and blue.
16
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
One ragweed plant can release as many as one billion grains of pollen!
51
The average home creates more pollution than does the average car.
33