Language shapes our world. But when we speak, there is actually a secret conversation happening beyond our words. It’s happening not with our mouths—but with our hands.

Prof. Susan Goldin-Meadow is a distinguished scholar of psychology at the University of Chicago. Her research into deaf children who were never taught sign language led her to studying why the gestures we do all day may contain more information about our minds than we realize. Now she’s included all her insights in a new book, “Thinking With Your Hands—The Surprising Science Behind How Gestures Shape Our Thoughts.”

Big Brains is sponsored by the Graham School for Continuing Liberal and Professional Studies.