[mjp]

Earth and a hypothesized early planet called Theia collided, and the two planets fused together 4.5 billion years ago. That impact also formed our moon, Science Alert explains.

The Sumerians, in a 6000 year old text, thought that a planet called Tiamat collided with the satellites of Nibiru to form the Earth and moon

[Bloody Sam Roberts]

The Sumerians, in a 6000 year old text, thought that a planet called Tiamat collided with the satellites of Nibiru to form the Earth and moon

With their somewhat limited intellect they must have extrapolated that from the star charts adorning the walls of the alien spacecraft that visited them regularly.