What science tells us about why we dream

Humans have long been fascinated by dreams, but what has science learned about them?

Neuroscientist Dr. Rahul Jandial says dreams benefit us — from helping regulate emotions, to processing trauma.

Today, On Point: What science tells us about why we dream.

Dr. Rahul Jandial, neurosurgeon and scientist specializing in brain, spine and spinal cord cancers at City of Hope, a private, non-profit clinical research center and hospital. Author of "This Is Why You Dream."