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Why we’re programmed to fear

Margee Kerr is a sociologist at Ursinus College in the United States and the author of “Scream”, a book about the science of fear. She explains why our brains are programmed to fear.

Flames billow from a car, consumed by the Rim Fire in 2013 near Groveland, California. (Photo by Justin Sullivan/Getty Images)

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1 minute