Smell is 'noisy' and 'in shades of grey': Scientists debunk ancient lock-and-key theory

University of Manchester scientists have overturned the 2,500-year-old theory that smell is detected by simple lock-and-key codes – using maggots with only one working olfactory sensory neuron (OSN), a nose with one nerve cell.

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<p><a href="http://www.physorg.com/news143125816.html">Smell is 'noisy' and 'in shades of grey': Scientists debunk ancient lock-and-key theory</a></p> <p>University of Manchester scientists have overturned the 2,500-year-old theory that smell is detected by simple lock-and-key codes – using maggots with only one working olfactory sensory neuron (OSN), a nose with one nerve cell.</p>