How many times has humanity been wiped down to near extinction?

[Skylar]

What happened to these civilizations all over the world that were carving up multi-ton granite and andesite blocks with copper chisels and quartz sand? They all lost interest in advancing?

Or the cost in manpower and resources was more than the cultural value of such monumental architecture to these civilizations. Or they had wars. Or they were conquered. Or there were changes in dynasties with different priorities.

No 'levitation beams' required.

Again, Crusader, you show us that you know hyper-diffusion is nonsense by what you refuse to discuss.

IF there was this vast pool of knowledge in the past that the Egyptians drew from to build the pyramids, then why did they start with caves? Why then move to crude clay structures, then to clay bricks, then to clay brick pyramids, then to proto-pyramids, then to true stone pyramids and only THEN to the Great Pyramid.

if the knowledge is in the past, why didn't they just start with the Great Pyramid and skip all those intermediate steps? Why develop their craft in building slowly and iteratively, innovating at each step, with one technology refined to create another, refined further to create another, step by step?

Your hyper-diffusion narrative makes zero sense. As the Egyptians created LESS sophisticated structures the father you go back in their archeological record. Where under hyper-diffusion, it would get MORE complex the farther you go back.

You know hyper-diffusion doesn't work. Which is why you avoid these theory killing holes like they were chasing you with a butcher knife. But you still tell us what you really believe by what you refuse to discuss.

 

[ReinyDays]

I don't know if someone already mentioned this ... but I think the premise in the OP is wrong ...

There were no humans in the Nile River Delta 50,000 years ago when the Egyptians arrived ... so we have 40,000 years of continuous human habitation before the current level at Gobekli Tepi ... and like AMart said, we're still digging there ... who knows how far back this settlement goes ...

The technology used goes back millions of years ... our upright gait allowed us to carry our tools from one encampment to another, something no other land animal does ... refining these tools is why our brains got bigger ... long long before Homo sapiens emerged ...

What's missing is Cesium-135 ... a sure sign of an advanced civilization ... otherwise it's just the Flintstones all over again ...