GREENSBORO, N.C. — Spicy food, cigarette smoke, and cold air. They all have one thing in common, they can make your nose run. But why? Well, it means your body is working right. “The purpose of the ...
It's the one scientists understand the least. But this much they know: Thousands of molecules produce odor. We detect those odors when the molecules, or a mix of them, bind with receptors in the nose.
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