Aluminum used to be more valuable than gold!
84
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
The bark of an older redwood tree is fireproof.
65
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Pumice is the only rock that floats on water.
14
Sound travels about 4 times faster in water than in air.
408