Sound travels fifteen times faster through steel than through air.
134
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
One cubic foot of gold weighs more than 1,200 pounds!
78
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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 weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51