Harvard Professor and psychologist Dr. Deirdre Barrett is one of the most well-renowned dream experts in the world. She joins Zale to discuss all things dreams-related. What exactly is a dream? How, if at all, should we interpret our dreams? Is there a way to control the content of our dreams, and even use our dreams to solve problems in our waking lives? What is lucid dreaming, and why is there so much surrounding them?