At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One ragweed plant can release as many as one billion grains of pollen!
51
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310