Why do we dream, and what is their purpose according to science?

Dreams are like movies your brain makes while you're sleeping, to help you learn and remember things better.

When you sleep, your brain is still working, it's sorting out all the stuff you learned during the day. Dreams are like little stories that help your brain practice what it learned, so you can use it later.

Imagine you're learning to ride a bike. During the day, you wobble and fall, but when you sleep, your brain shows you a dream where you're riding smoothly, like watching a fun video of yourself being super cool on two wheels! That helps you remember how to balance better the next day.

Dreams also help your brain clean up old information. It's like having a toy box that gets messy with all your toys from different days. Your brain sorts out what’s important and what can wait, just like when you tidy up your room before bedtime.

Sometimes, dreams are even about how you feel. If you're excited or scared during the day, those feelings might show up in your dreams too, like having a party or chasing a big monster in your sleep!