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Brosius did more research. He read Diane Ackerman’s A Natural History of the Sensesand realized just how powerful the nose is. He learned that gazillions of years ago, when primitive ancestors of man were living in the ocean, scent was used to detect an enemy or find a mate. The sense ultimately became so powerful that a heap of tissue on top of the nerve cord evolved into the brain. “Our cerebral hemispheres were originally buds from the olfactory stalks,” Ackerman writes. “We think because we smelled.”
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Invisible perfume has almost been perfected. After two years, Brosius realized the missing ingredient was sex. He added natural amber to the mix. “Of the God-knows-how-many molecules that have been found in the chemical composition of amber, several of them are uncannily similar to human hormones,” he says. “I’m fairly certain that’s why it’s been so popularly used in perfume throughout history. It smells like us. It smells human.”