The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Sound travels about 4 times faster in water than in air.
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Sound at the right vibration can bore holes through a solid object.
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German chemists made a replica of a trophy the size of one molecule.
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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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For every gallon of sea water, you get more than a quarter pound of salt.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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Iron weighs more after it rusts.
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