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    Natural Sciences

    BrainStuff

    Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore — and explain — the everyday science in the world around us.

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    Copyright: 2025 iHeartMedia, Inc. © Any use of this intellectual property for text and data mining or computational analysis including as training material for artificial intelligence systems is strictly prohibited without express written consent from iHeartMedia

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    Latest Episodes:
    What is silica gel? Feb 02, 2009
    Show notes

    Everyone's familiar with those little packets of silicate gel, found in thousands of products -- but what exactly do they do? Check out this HowStuffWorks podcast and learn more about silica gel.

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    Why doesn't the vacuum of space suck away Earth's atmosphere? Jan 30, 2009
    Show notes

    It's often said that "nature abhores a vacuum." If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast.

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    How Vacuums Work Dec 15, 2008
    Show notes

    If a balloon was filled by a vacuum -- rather than helium or air -- would it float? Check out this HowStuffWorks podcast to learn the science behind balloons and vacuum.

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    What is an MRE? Dec 12, 2008
    Show notes

    An MRE -- or meal ready to eat -- contains precooked, sterilized food originally made to nourish soldiers. Check out this HowStuffWorks podcast to learn more about the retort packaging that makes MREs possible.

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    How Polygraph Machines Work Dec 03, 2008
    Show notes

    Also known as 'lie detectors,' polygraphs are used to record an individual's vital signs, such as breathing rate, pulse, and so forth. Check out this podcast from HowStuffWorks to learn more about polygraphs and the art of lie detection.

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    How much fuel does an international airplane use for a trip? Nov 21, 2008
    Show notes

    A Boeing 747 uses approximately one galloon of fuel per second -- over the course of a ten hour flight, it might burn 36,00 galloons of fuel. How does this compare to a car? Check out this HowStuffWorks podcast to learn more about airplane mileage.

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    What are MP3 files and how do they work Nov 19, 2008
    Show notes

    CDs store music using 44,100 16-bit digital samples per second, adding up to about 10 megabytes per minute -- and that's too large to move easily move across the internet. Check out this HowStuffWorks podcast to learn how MP3 files solve this problem.

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    Why do apples and potatoes turn brown when you slice them? Oct 10, 2008
    Show notes

    All cells contains thousands of enzymes, and each of these enzymes is necessary for the cell. Check out this HowStuffWorks podcast to learn which enzymes cause apples and potatoes to turn brown upon exposure to oxygen.

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    What is an anti-siphon valve? Oct 08, 2008
    Show notes

    In houses with a built-in sprinkler system, anti-siphon valves prevent pesticides, pet waste, and other contaminants from polluting the home's water source. Check out this HowStuffWorks podcast to learn more about anti-siphon valves.

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    How a GFCI outlet works Oct 03, 2008
    Show notes

    A normal 120 volt outlet in the US has two vertical slots and a role hole centered below the slots -- the outlets with a pair of red and black 'test' and 'reset' buttons are known as GCFI outlets. Check out this HowStuffWorks podcast to learn more.

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