Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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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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Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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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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For every gallon of sea water, you get more than a quarter pound of salt.
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