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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4.5 pounds of sunlight strike the Earth each day.
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German chemists made a replica of a trophy the size of one molecule.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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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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Nearly 50% of the world's scientists are assigned to military projects.
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Balsa wood is classified as a hard wood!
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