Your Brain on Sound

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Sound and hearing shapes the mind, and is key to to survival for almost every animal, as Seth Horowitz , an auditory neuroscientist at Brown University and the author of "The Universal Sense: How Hearing Shapes the Mind," explains.

"When you get to humans or primates," he says, "we tend to have quite ornate auditory communication...but, then again, you can look at bats. Bats build their world from sound; they build three-dimensional models of the world just using sound, but their brains [are] the size of a peanut."