After a long day when we lay down to rest, that’s when our brains really fire up to help us dream. Dr. Rahul Jandial is a neurosurgeon and neuroscientist who oversees the Jandial Lab at City of Hope Cancer Center in Los Angeles. He joins host Krys Boyd to discuss how dreams help or brains function, why they are essential to memory and why dreams across cultures are remarkably similar. His book is “This Is Why You Dream: What Your Sleeping Brain Reveals About Your Waking Life.”