Why Do People Feel Nostalgia When Listening to Old Music?

Imagine you're sitting in your old bedroom, listening to a song that was playing on the radio when you were ten. Suddenly, you feel happy, like you're back in that room again. This is nostalgia, and it happens because music acts like a time machine for your brain. When you hear familiar songs from your past, your brain remembers all the feelings and moments attached to them. That’s why old music can make you smile, cry, or even feel calm, it's like turning on a switch that lights up your most cherished memories.