Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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The bark of an older redwood tree is fireproof.
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Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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The average temperature at 40,000 feet above sea level is -60 F.
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Some toothpastes and deodorants contain the same chemicals found in antifreeze.
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