Smell and taste, of course, were sister senses. More like Siamese twin sisters, with the first having most of the organs, including the brain. The second sister was built for pleasure and the occasional bitter warning. But it was smell that carried memory. He’d done enough work in neurology and even recent reading in neuroscience to know how simplistic his concept was, but that was still how he thought of it. Smell was like the wormhole connecting you to the other parts of your life. Memories of smell didn’t fade, and they short-circuited your entire psychology—they didn’t tunnel through
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