The Nibiru Cataclysm is something people talk about or worry about, but it is not real. It's a made-up story about a planet or star called Nibiru that is said to be coming to Earth and causing destruction. It was first talked about in the 1990s, but scientists have not seen or found any evidence of it. It is not possible for this to happen because scientists know a lot about the planets, stars and other objects in our Solar System, and they have not seen anything that could be Nibiru.