The tropical manchineel tree bears apple-like fruit, but eating it -- or just touching its leaves or bark -- can cause a world of hurt. Learn about the 'apple of death' in this episode of BrainStuff.

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Book collectors may spend thousands on signed copies or rare editions, but the biggest price tag in book-buying history was in the millions. Learn why the world's priciest book is essentially a treatise on plumbing in this episode of BrainStuff.

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Human blood is red -- yes, even when it's in your body. Learn why -- and why your veins appear blue through your skin -- in this episode of BrainStuff.

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Email systems are designed to keep BCC recipients hidden, but mistakes -- and attacks -- can happen. Learn about CCing, BCCing, etiquette, and email security in this episode of BrainStuff.

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There are indeed gusts of wind strong enough to knock a person off their feet, but for most of us, it'd take a lot of wind. Learn more about how wind works in this episode of BrainStuff.

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Shangri-La began as a work of fiction, but it's loosely based in Buddhist mythology and has borne a couple namesakes in the real world. Learn about Shangri-La in this episode of BrainStuff.

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NASA tests everything it sends into space for a lot of things -- including stinkiness. Learn who NASA's odor volunteers are and what they do in this episode of BrainStuff.

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Since the Civil War, Americans have taken a day in late May to honor fallen soldiers. Learn two theories on how this tradition began in today's episode of BrainStuff.

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If you've ever gotten a hot shock from someone flushing a toilet while you were taking a shower, there's an easy fix for that. Learn why it happens and how to fix it in this classic episode of BrainStuff.

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Depending on the camera settings and recording technology used to film helicopters, the blades can appear to bend, fragment, stand still, or move backwards. Learn why in this classic episode of BrainStuff.

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