BrainStuff

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Latest Episodes:

Why does lettuce stored in a bag stay fresh longer? Jul 30, 2014

Show notes

Many foods you'll find at the grocery store -- like lettuce, for example -- are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is, and how it keeps food fresh longer, in this episode of BrainStuff.

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How much sugar do they really put in soda? Jul 28, 2014

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Sodas and soft drinks contain a surprising amount of sugar -- more than you might expect. Tune in as Marshall Brain reveals how much sugar is in soda in this episode of BrainStuff.

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What is market capitalization? Jul 24, 2014

Show notes

If all the money in the US only totals 8 trillion dollars, how can the New York Stock Exchange have stocks valued at 26 trillion dollars? Tune in as Marshall Brain breaks down the practice of stock capitalization in this podcast from HowStuffWorks.com.

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Why can you hear the ocean in a seashell? Jul 14, 2014

Show notes

There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.

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What is an Omega-3 fatty acid? Jul 11, 2014

Show notes

Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.

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What do those diamond-shaped signs on buildings mean? Jul 09, 2014

Show notes

The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.

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Should you turn your computer off when it's not in use? Jul 07, 2014

Show notes

When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.

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How big is the universe? Jul 04, 2014

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If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.

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Why does hydrogen peroxide foam when you put it on a cut? Jul 02, 2014

Show notes

Hydrogen peroxide's foaming action is due to the catalase in blood and cells. Check out this HowStuffWorks podcast to learn how hydrogen peroxide interacts with catalase.

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What is a medical leech? Jun 25, 2014

Show notes

Medical leeches are raised in captivity and help patients heal wounds. Discover how leeches and other parasites are used for medical purposes in this podcast from HowStuffWorks.com.

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