A couple of years ago, I stumbled upon the wiki entry about sumerians blood lines/royalty Interesting read https://en.wikipedia.org/wiki/Sumerian_King_List Staring with the dynasty of Hamazi https://en.wikipedia.org/wiki/Sumerian_King_List#Dynasty_of_Hamazi stuffs are pretty "normal", it's reign after reigns, spanning over 12/20 years (6 to 90) on average. But before that...https://en.wikipedia.org/wiki/Sumerian_King_List#First_dynasty_of_Kish Now you're entering the realm of "what the fuck"... https://en.wikipedia.org/wiki/Sumerian_King_List#Antediluvian_rulers En-men-lu-ana 12 sars (43,200 years)