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Scientists decode how brain distinguishes between scents

Scientists have found that the brain can tell different scents apart by integrating multiple signals to identify one unique smell. The smell of an orange, a lemon, and a grapefruit each has strong acidic notes mixed with sweetness, yet each scent is distinguishable from its relatives. These fruits smell similar because they share many chemical compounds. It has been a puzzle how the brain tells them apart or how it remembers a scent.

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