Why people think they see ghosts?

People sometimes think they see ghosts because their brain is trying to make sense of something that’s not quite clear.

Imagine you’re playing hide and seek in a dark room. You hear a squeak behind the couch, but when you look, there's nothing there. Your brain says, “Wait, what was that?” So it makes up a picture, maybe a ghost, to explain the squeak.

Sometimes things move without anyone touching them. Like when you leave your toy train on the floor and come back later, and it’s gone, but no one saw it move! Your brain might think a ghost pushed it.

Have you ever seen shadows dance on the wall at night? They look like people or animals walking by. That’s just light playing tricks. Your brain thinks it sees someone, maybe a ghost, when it's really just light moving around.

So, seeing ghosts is like guessing what something is when you can’t see it clearly, your brain just fills in the blanks!