One barrel of petroleum holds 42 gallons.
20
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 only letter not appearing on the Periodic Table is the letter "J".
180
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
German chemists made a replica of a trophy the size of one molecule.
68
Nylon is made from coal and petroleum.
42
Hot water can freeze faster than cold water.
181