In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Sound travels fifteen times faster through steel than through air.
134
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43
Iron weighs more after it rusts.
68