BrainStuff

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Latest Episodes:

How do space mirrors work? Jun 01, 2012

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Mirrors placed in space could deflect excessive sunlight and combat global warming trends. Find out more about space mirrors in this podcast from HowStuffWorks.com.

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Why do newspapers turn yellow over time? May 21, 2012

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Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff.

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Why do eggs turn hard when you boil them? May 11, 2012

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Eggs are rich in protein, and this protein causes eggs to turn hard when they're boiled - but how does it actually work? Tune in as Marshall Brain breaks down the science behind hard-boiled eggs.

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How do you add a USB device if you've run out of ports? Apr 27, 2012

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Desktop computers and laptops only have so many USB ports, so what do you do when you want to plug in more USB devices and they're all full? You buy a USB hub. Find out how these hubs work, and which kind you should get, in this episode of BrainStuff.

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What is an autograph worth? Apr 23, 2012

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An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.

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What are electrolytes? Apr 20, 2012

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What are electrolytes, and why do athletes and sick kids need them? Marshall Brain explains how ions and electrolytes work in your body in this episode.

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Why do most zippers say 'YKK' on the pull-tab? Apr 13, 2012

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Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.

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How much coal does a light bulb need to run for a year? Apr 09, 2012

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How much coal do you need to run a 100-watt light bulb 24 hours a day for a year? The answer might surprised. Tune in and find out in this episode of BrainStuff.

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What is mayonnaise? Apr 06, 2012

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Mayo is an emulsion - a mixture of two liquids that normally can't be combined. So how do these ingredients come together? Tune in to learn how oil, egg yolks and acid combine to form one of the world's most popular condiments.

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Is there an easy way to understand how time zones work? Apr 04, 2012

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There are 24 different time zones -- but why do we have them? In this podcast, Marshall recounts how society evolved time zones, and also gives you an easy way to model the structure of time zones across the globe.

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