An Outhouse For The Sea

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Scientists now know why coffee rings have dark, well-defined edges, as seen in the image above. The research finding may have implications on the development of inks and paints. Marina Dominguez/NPR hide caption

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Scientists Crack The Physics Of Coffee Rings

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Linguist John McWhorter says sign languages function in ways that no other languages do. But, he says, like all spoken languages, they also morph over time. iStockphoto.com hide caption

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Linguist Considers 'What Language Is' — And Isn't

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Teaching A Chimp To Speak In 'Project Nim'

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'Brain Bugs': Cognitive Flaws That 'Shape Our Lives'

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