For every gallon of sea water, you get more than a quarter pound of salt.
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The bark of an older redwood tree is fireproof.
65
Aluminum used to be more valuable than gold!
84
Research indicates that plants grow healthier when they are stroked.
173
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Sound travels fifteen times faster through steel than through air.
134
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