The world is filled with millions upon millions of distinct smells, but how mammals' Brains Evolved to tell them apart is something of a mystery.
A section of the front part of the piriform cortex, an area of the brain involved in the sense of smell. The cortex layers
are stained with florescent antibodies to better distinguish key differences. Layer 1 contains two separate sections;
the layer closest to the black-colored surface...
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