Sound travels about 4 times faster in water than in air.
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One ragweed plant can release as many as one billion grains of pollen!
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Your brain is 80% water.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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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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The average home creates more pollution than does the average car.
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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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