Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Research indicates that plants grow healthier when they are stroked.
173
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 cubic yard of air weighs about 2 pounds at sea level.
31
Hot water can freeze faster than cold water.
181
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
No matter how cold it gets, gasoline will not freeze.
107
One barrel of petroleum holds 42 gallons.
20