Aleya (Ghost light)

Okay kiddo, so remember how we talked about how light moves in waves? Well, sometimes when you're out at night, you might see a special kind of light called an aleya.

An aleya is a special light that you can see in some parts of the world, like in marshes or swamps. It's a strange light that kind of hovers over the ground, and people used to think it was a ghost or a fairy.

But really, an aleya happens because of something called bioluminescence. Bioluminescence is when living things, like tiny bacteria, make their own light. These bacteria are often found in places like marshes or swamps, and when they get shaken up a little bit (like when someone walks through the area), they give off a little burst of light that looks like an aleya.

So when you see an aleya, you're not really seeing a ghost or a fairy, but a special kind of light that's made by tiny living things. It's still pretty cool though, right?