Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Hot water can freeze faster than cold water.
181
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Sound travels fifteen times faster through steel than through air.
134
The smell of freshly cut grass is actually a plant distress call.
31