Scientist Explains Why Dogs Smell Better Than Robots

Dogs can smell explosives like landmines, and detect medical conditions including seizures, diabetes, and many forms of cancer — with up to 98% accuracy. Inventor Andreas Mershin wants to replicate that — and put a nose in every cell phone. WIRED’s Emily Dreyfuss spoke with Mershon to find out why that’s easier said than done, and to learn what building a robotic nose has taught us about smell.
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