Scientists have also known that animals generate a similar natural plastic called chitin. Like cellulose, chitin is a carbohydrate made of long chains of sugar molecules. Chitin is found in the shells of all insects and crustaceans, like crabs. Each year the crabmeat industry had thrown away thousands of tons of chitin because scientists couldn’t figure out how to extract chitin from the shells in a usable form.

REF: Dworetzky, T. 1987. How an old crab could keep you in stitches. Discover, Feb. p. 16.. Photo: Crab_Pixabay.com

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