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How does Nitroglycerin work?

What do you get when you combine acids and glycerin? Nitroglycerin! What is this substance used for, and why is it so unstable? In this episode, Marsh... Read more

December 8, 2014 | 2 min

What is chewing gum made of?

Up until World War II, chewing gum was made of a substance called chicle. Check out this HowStuffWorks podcast to learn more about the ingredients of ... Read more

December 5, 2014 | 1 min

Why can't a couch potato run a marathon?

Intuitively, it makes sense that a trained athlete can run a marathon easily, while a "couch potato" can barely run a mile. But what's the biology beh... Read more

December 3, 2014 | 4 min

Why doesn't paper money disintegrate in the washing machine?

Normal paper is made of cellulose from trees, but paper money is made from cotton and linen fibers. Learn how this makes paper money more water-resist... Read more

December 1, 2014 | 1 min

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