It takes a lot of water and some toxic chemicals to dye our denim blue. Learn how research into chitosan could make the process more environmentally friendly in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/green-tech/sustainable/denim-dyeing.htm

American Versus British English: What Are Biscuits, Muffins, and Pudding?
09:51

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14:22

Did the Lost Continent of Lemuria Really Exist?
11:05