Iron weighs more after it rusts.
68
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
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
German chemists made a replica of a trophy the size of one molecule.
68
One barrel of petroleum holds 42 gallons.
20
Each day, up to 150 species of life become extinct.
-23
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88