Zecharia Sitchin

Zecharia Sitchin's series The Earth Chronicles, beginning with The 12th Planet, revolves around Sitchin's interpretation of ancient Sumerian and Middle Eastern texts, megalithic sites, and artifacts from around the world. He theorizes the gods of old Mesopotamia were actually astronauts from the planet "Nibiru", which Sitchin claims the Sumerians believed to be a remote "12th planet" (counting the Sun, Moon, and Pluto as planets) associated with the god Marduk. According to Sitchin, Nibiru continues to orbit our sun on a 3,600-year elongated orbit. Sitchin also suggests that the asteroid belt between Mars and Jupiter is the shattered remains of the ancient planet "Tiamat", which he claims was destroyed in one of Niburu's orbits through the solar system. Modern astronomy has found no evidence to support Sitchin's claims.

According to Sitchin, the Sumerians relate how 50 Anunnaki, the inhabitants of Nibiru, came to Earth approximately 400,000 years ago with the intent of mining raw materials, especially gold, for transport back to Nibiru. With their small numbers they soon tired of the task and set out to genetically engineer laborers to work the mines. After much trial and error they eventually created homo sapiens sapiens: the "Adapa" (model man) or Adam of later mythology. Sitchin claims the Anunnaki were active in human affairs until their culture was destroyed by global catastrophes caused by the abrupt end of the last ice age some 12,000 years ago. Seeing that humans survived and all they had built was destroyed, the Anunnaki left Earth after giving humans the opportunity and means to govern themselves.