BrainStuff

Latest Episodes:

What is a decibel, and how is it measured? May 22, 2015

Show notes

The decibel unit is used to measure the intensity of a sounds. Check out our HowStuffWorks article to learn more about the decibel scale.

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Why do the plugs on some appliances have two prongs and others have three? May 20, 2015

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When you look at a normal 120-volt outlet in the United States, there are two vertical slots and then a round hole centered below. Take a look at this HowStuffWorks article to learn why appliance cords are shaped this way.

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How do sodium acetate heat pads work? May 18, 2015

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Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.

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How do they create patterns in a baseball field? May 15, 2015

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Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.

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How does rust work? May 08, 2015

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In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.

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What exactly is pastrami? May 01, 2015

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Like cheese, pastrami is a good example of old-fashioned food preservation techniques. Find out how corned beef becomes pastrami in this podcast from HowStuffWorks.com.

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How do instant cameras work? Apr 24, 2015

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Instant cameras makes it possible to see a photograph almost immediately after you take it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.

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Why do feet stink? Apr 22, 2015

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What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.

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What do the symbols on the U.S. one-dollar bill mean? Apr 20, 2015

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If you've ever looked carefully at a U.S. one-dollar bill, you've probably noticed some mysterious symbols and Latin phrases. What do these symbols stand for? Why are they on there? Marshall Brain breaks it down for you in this episode.

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How many calories does a person need daily? Apr 17, 2015

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The amount of calories a person needs to consume on a daily basis varies by individual. Discover the three factors that can help you determine your daily caloric needs in this episode of BrainStuff.

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