Although we don’t remember most of them, we spend about two hours every night dreaming. Some dreams are similar, others are scary, or anxiety inducing. But while dreams can transport us to places we could never experience in our waking lives, do they have a purpose? On this episode, Dr. Sanjay Gupta talks to neuroscientist and dream expert, Sidarta Ribeiro, about the importance of dreaming, what goes on in our bodies while we’re dreaming, and how to take control of our dream world. Plus, Ribeiro shares why he believes we all should start sharing our dreams with others. To learn more about how CNN protects listener privacy, visit cnn.com/privacy