Sound travels fifteen times faster through steel than through air.
134
Iron weighs more after it rusts.
68
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5