A Duke neuroscientist wants to know what makes people different from each other - not just different in how they look, but different in how they act and react. To help answer his question, Dr. Ahmad Hariri is undertaking one of the largest research projects of its kind in the world. His team is collecting data on over 1,200 students using personality surveys, brain imaging technology, and genetic sequencing to better understand the connections between genes, brains, and behavior.

Hariri explains what happens in our brains when we perceive a threat and how this relates to clinical depression and anxiety.

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