Do we remember our dreams more than our nightmares, and how would a scientist even find out? In this Halloween episode, 9-year-old Lennon’s question takes us to a sleep lab at UMass Amherst, where sleep scientist Rebecca Spencer studies how kids sleep. Along the way, Rebecca shows us the wire-covered caps that let scientists watch brains while people sleep, and explains why your body is paralyzed every night during REM sleep. Is Lennon’s hypothesis right? Listen and find out!