Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
4.5 pounds of sunlight strike the Earth each day.
27
A ball of glass will bounce higher than a ball made of rubber.
73
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Balsa wood is classified as a hard wood!
41
One barrel of petroleum holds 42 gallons.
20