18-39 Segment 2: “Flat Head Syndrome”

Since the beginning of the “baby on back” movement to reduce sudden infant death syndrome, many more infants are developing misshapen heads with a flat spot in one place. An expert discusses whether this is serious, how it can be treated with a helmet-like device, and how it might be prevented.

17-43 Segment 1: The Biology of Addiction

Scientists are learning the specific workings of the brain when it is addicted to a substance or behavior, and showing that all addictions are similar.