BrainStuff

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Latest Episodes:

Where did the potato chip come from? Mar 05, 2014

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Potato chips were invented in 1853 by an American cook named George Crum, and they've been a popular food item ever since. Learn more about George Crum and the evolution of the potato chip in this episode of BrainStuff.

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What causes poison ivy blisters? Mar 03, 2014

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When people get a rash from poison ivy, their bodies are reacting to a chemical called urushiol. Check out this HowStuffWorks podcast to learn more about poison ivy rashes.

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How do mood rings work? Feb 28, 2014

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Mood rings claim to reflect changes in your emotional state -- and, in a way, they do. Discover the science behind mood rings in this episode of BrainStuff.

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What makes your knuckles pop? Feb 26, 2014

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Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.

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Could I see a flashlight beam from Earth on the moon? Feb 24, 2014

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If you shone a flashlight beam from Earth, would you be able to see it from the moon? It depends. Find out why -- and get a lesson in how light works -- in this episode of BrainStuff.

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Why do tools have "drop forged" stamped on them? Feb 21, 2014

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Tools that say "drop forged" have been created using a technique called drop forging. Find out how drop forging and several other kinds of forging work, and why drop forging is a sign of a sturdy tool, in this episode of BrainStuff.

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How does the lighter in a barbeque grill work? Feb 19, 2014

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A barbeque grill has a push-button lighter that relies on piezoelectricity to generate a spark. Learn more about how piezoelectricity works -- and the kinds of devices that use piezoelectric materials -- in this episode of BrainStuff.

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How can you measure the height of a tall tower? Feb 17, 2014

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In this episode of BrainStuff, Marshall reveals three common techniques for measuring the height of tall objects like towers.

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Why does the moon look bigger when it's near the horizon? Feb 14, 2014

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When the moon is near the horizon, it appears to be much bigger than when it's high in the sky. But is it really larger? Tune in to find out.

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How do photochromatic lenses work? Feb 12, 2014

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Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as "transition" lenses in this episode of BrainStuff.

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