The same nerve receptor that responds to the green paste on your sushi plate is activated by car exhaust, the smoke of a wildfire, tear gas and other chemical irritants. iStockphoto hide caption

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Sushi Science: A 3-D View Of The Body's Wasabi Receptor

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The origin of itch has confounded scientists for decades. Oktay Ortakcioglu/iStockphoto.com hide caption

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Why You Have To Scratch That Itch

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