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
The average home creates more pollution than does the average car.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
For every gallon of sea water, you get more than a quarter pound of salt.
45
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Scientists in Germany have developed a candy that doesn't cause cavities.
11
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55