Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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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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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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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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