Middle Assyrian Red Sard Cylinder Seal, South Mesopotamia, century BC Showing a griffin-demon (apkallu) tearing a branch from a tree. This is an unusual seal with regards to the typical griffin-demon and tree motif in ancient art.
The Sumerians believed that the Annunaki were a highly superior, advanced race. Sumer was constructed under the direction of the Annunaki. The Sumerians believed they were a race of aliens from the planet Nibiru.