Why does nostalgia feel warm and painful at the same time? In this SleepWise bedtime story, we explore the science of nostalgia: reconstructive memory, cue-dependent recall, why the brain remembers “peaks and endings,” and why nostalgia often visits at night. With a brief, immersive 80s/90s atmosphere early on, we’ll gently trace how music, places, and objects become keys to entire rooms of the past—and how to use nostalgia as comfort, not escape.Put your phone down, get comfortable, and drift.