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Why Do We Use Smells Like Dogs Do?
Hamila Dalton is a senior scientist at the Monelle Chemical Senses Center in Philadelphia. We don't use scent the way dogs and other animals do, she says. In part, it's because we're bipedal; our noses evolved to be farther away from the earth. "We have discounted that we really can smell a lot of chemicals at vanishingly trivial concentrations"