BrainStuff

Macadamias are delicious and nutritious in small servings, but they're also the most expensive nuts in the world. Learn what they are and how they're grown in this episode of BrainStuff.

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Honeybees can heat and cool their hives to keep the temperature comfortable. Learn about one method -- bearding -- in this episode of BrainStuff.

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Researchers have found a sea slug that incorporates pieces of algae cells into its body to live off of photosynthesis. Learn more about it in this episode of BrainStuff.

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The star Polaris, when viewed in the Northern Hemisphere, points you almost due north. Learn how it's aided navigators for centuries, but why it won't always do so, in this episode of BrainStuff.

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Walt Disney based Sleeping Beauty's castle -- the centerpiece of Disneyland and the Disney logo -- on a real castle in the Bavarian Alps of Germany. Learn about Neuschwanstein Castle's strange and tragic history in this episode of BrainStuff.

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OK, this one is no contest: Your dishwasher can get dishes cleaner, but that doesn't necessarily mean that using one is healthier. Learn about the science behind the suds in this episode of BrainStuff.

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Thousands of participants and millions of viewers turn out every year for the spectacle that is the Macy's Parade. Learn its history and what goes into running it in this episode of BrainStuff.

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Americans eat a LOT of turkey around the winter holidays, but why? Learn about turkey's festive history and when we eat the most of it in this episode of BrainStuff.

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It’s good hygiene to wash your hands after touching shared bathroom surfaces. But bars of soap are also a shared surface. Learn why soap is pretty clean in this episode of BrainStuff.

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Spoiler alert: Yep, all placental mammals have belly buttons, but dogs' and cats' look a little different than ours. Learn how belly buttons work in this episode of BrainStuff.

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