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
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
The earth is approx. 6,588,000,000,000,000,000 tons.
175