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The Point of That Groove in Your Upper Lip

The Point of That Groove in Your Upper Lip

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Summary

Many animals use chemical signals — pheromones — to find mates, mark territory, and warn of danger. Humans, despite popular belief, can’t detect them. This episode examines these signals — including the anatomical relic of our pheromone-sniffing past, still sitting in the middle of your face.


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