Iron weighs more after it rusts.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The average temperature at 40,000 feet above sea level is -60 F.
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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 force of a suction cup is calculated using F=AP.
15
Cold water weighs more than hot water.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
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