What are you actually arguing in favour of, with regards to these ancient tales?
That mankind was genetically altered by aliens? That Sumerians were given technology or help by aliens? That aliens provided the knowledge to build the pyramids?
If so, why would aliens swing by, give us limited help (v. limited really, but enough to reveal their presence) and then fly off into the night? Aren't you underestimating what mankind can learn on its own without the necessity of some kind of exogenous agency?
ie: the evolution of ancient civilisations is all about the centre and periphery - it is no coincidence that the Nile delta and Mesopotamia areas were the cradle of civilisations - when you get agriculture productive enough to support more people than actually work in agriculture, then you can get specialisation - whether it is cultural, intellectual, mercantile or military.....I fail to see where aliens need to make an appearance.....
As for ancient tales - you believe them? Are we all descended from Adam and Eve then? Or Noah? Or the myth that the entire English race is descended from three boat-loads of people who landed in England? Creation myths helped create a shared identity, a sense of cultural belonging - it mattered little what was believed in, so long as it was believed.
As for the proof of giants you posted earlier - one of them says he was 12ft tall and weighed 2 tonnes....placing his BMI at approximately 145....clinical obesity in humans starts at 30....must have been one fat giant

Also convenient he just.....disappeared at some point......
Btw: Can you post something with some intellectual credibility - ie: articles from jstor or the like, rather than random websites that any old person can write any old spiel on. You keep writing about what the "experts" tell us, but then go to quote personal websites as your sources....find me some real experts please
