Human origins; spanning everything, from the oldest known recorded histories of the world, to modern genetic discoveries. a superior alien race called the Anunnaki from the planet Nibiru incrementally terraformed and populated Earth for their own reasons, later returning to Earth and, through a process of genetic manipulation, produced humans. These ideas supposedly come from translating and interpreting ancient Sumerian texts (Anunnaki and Nibiru are names from Sumerian religious myths).
It is argued that these alien beings are responsible for the megalithic structures around the world, the growth and advancement of Sumer, the domestication of plants and animals, and supposedly strange flaws in human DNA. (Many of these ideas have been inspired by the claims of Erich von Däniken and Zecharia Sitchin.