Who were the Annunaki? They were the Watchers, Watchmen assigned to earth to watch over Yahweh's Creation in the Garden of Eden and Earth . They were created by God as perfect Angels. These Watchers rebelled against God and their assignment and a mutiny followed as they abandoned  their mission to oversee humans and began to defile the women of the earth by having offspring with them.  This led to a giant defect in the DNA of the offspring and an eventual almost complete contamination of the human DNA. By the time Yahweh destroyed the world with a flood because of this contamination, only one family on earth was left with pure human DNA.