BrainStuff

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How Replacing Toilets Works Dec 24, 2014

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A family of four can consume more than 300 gallons of water per day. Old toilets use 5 gallons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes.

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Why are my power bills so high? Dec 22, 2014

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When it comes to energy usage, heating and cooling appliances contribute the most to your power bill. Tune in to find out which appliances are the most power-hungry -- and why -- in this podcast from HowStuffWorks.com.

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Is there a way to compare a human being to an engine? Dec 17, 2014

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Human muscles are essentially biological engines. In terms of efficiency, biological engines are amazing. Listen in as Marshall Brain calculates human efficiency in this episode.

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How High-level Nuclear Waste Works Dec 12, 2014

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What exactly is high-level nuclear waste, and how are we dealing with it today? In this episode, Marshall breaks down the techniques used to store high-level nuclear waste.

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How does fusion power work? Dec 10, 2014

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Fusion reactors like the sun produce huge amounts of energy, so why aren't there fusion power plants everywhere? In this episode, Marshall explains the chemistry of fusion reactions and discusses how close fusion is to becoming a viable energy source.

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How does Nitroglycerin work? Dec 08, 2014

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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, Marshall takes a look at the chemistry and explosive qualities of Nitrogyclerin.

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What is chewing gum made of? Dec 05, 2014

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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 modern chewing gum.

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Why can't a couch potato run a marathon? Dec 03, 2014

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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 behind it? Find out how fit and unfit bodies respond to exercise in this episode.

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How do polymer crystals work, and why do they absorb so much water? Nov 28, 2014

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Polymer crystals are extremely absorbent, and that's why you'll often find them in disposable diapers. Marshall explains how polymer crystals are able to absorb large quantities of liquids -- and keep you cool and dry -- in this episode.

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How do people pull large objects with their teeth? Nov 26, 2014

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Have you ever seen those folks that can pull a whole truck with their teeth? Tune in as Marshall Brain explains the physics behind pulling large objects with your teeth in this episode.

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