When you sleep, daydream, or drift between being awake and asleep, your brain can build entire realities - images, sounds, and emotions that feel real, even when they aren’t. And here’s the mystery: this isn’t a glitch. It’s how your brain works.

Some people can even become aware inside their dreams. Others use these strange brain states to spark creativity and new ideas. So here’s the question for today: If your brain can create worlds on its own… how does it decide what’s real?

Let’s find out.