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
A ball of glass will bounce higher than a ball made of rubber.
73
Iron weighs more after it rusts.
68
Nylon is made from coal and petroleum.
42
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Balsa wood is classified as a hard wood!
41
The earth is approx. 6,588,000,000,000,000,000 tons.
175