They are still here among us - they just call themselves consultants.
The construction method is pretty well known by now, big ramps of gravel to roll/push stones up. Gravel spread around, contruction times vs. number of people on site, well known.
Another example a group of university students hauled a Stonehenge sized rock from a likely quarry to Stonehenge site in a couple of weeks.
We forget what human labor can do.
That's not totally true, is it? The first pyramid was Djoser's pyramid in saqqara in about 2650BC. The first true pyramid was build around 2590BC (around 60 years later). The largest and greatest of the pyramids was built around 2570BC (only about 80 years after the first pyramid). Things really went downhill from there, but the Egyptian civilization lasted for another 3000 years.
There is nothing about the ancient pyramids that lies beyond human capability. There are plenty of videos on youtube of 1-4 people moving 15-ton stone blocks around.
Occam's razor: the simplest explanation is humans built the pyramids and no aliens were involved.
And before that, they "buried their dead in pit graves dug out from the sand" (same article)
That _does_ indicate an increase in sophistication over time, from pit graves, to mastabas, to pyramids.
Pyramids were built by human labour under direction of aliens, as landing pads for starships.
https://www.splcenter.org/hatewatch/2018/01/02/close-encount...
https://hyperallergic.com/470795/pseudoarchaeology-and-the-r...
> It is notable that many (though not all) extraterrestrial theories focus on archaeological structures at sites within Egypt, Africa, South America, and North America — a fact that has led some academics to see beliefs in ancient alien engineers as a stalking horse for racism. In a piece for the online journal The Conversation rather frankly titled “Racism is Behind Outlandish Theories about Africa’s Ancient Architecture,” Julien Benoit, a postdoctoral researcher in vertebrate paleontology at the University of the Witwatersrand (South Africa), addressed the continued harm of these theories:
>> Firstly, these people try to prove their theories by travelling the world and desecrating ancient artefacts. Secondly, they perpetuate and give air to the racist notion that only Europeans – white people – ever were and ever will be capable of such architectural feats.
> It is notable that many (though not all) extraterrestrial theories focus on archaeological structures at sites within Egypt, Africa, South America, and North America — a fact that has led some academics to see beliefs in ancient alien engineers as a stalking horse for racism.
How about, they focus on those sites because that's where human civilization started in the first place? They'd happily focus on London, if London existed in 10000 B.C.
Ancient Aliens people are crackpots[0], but are mostly harmless ones. But taking that and viewing it as "stalking horse for racism" is just trying to score cheap virtue points. It's worse than crackpottery in my book.
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[0] - I'm not one of them; to be clear, I was just making a drive-by StarGate joke, as I always do in such topics if I see that no one has made it before, because it's a notable scifi franchise that took the "ancient aliens" concept and went wild with it.
No, denying that racism has a role to play here is worse than crackpottery.
As for "brown people", depending on who and when you ask those people can be considered "white people", North African and the Middle east have usually been considered Caucasian (https://en.wikipedia.org/wiki/Caucasian_race), historically Mediterranean is a better designation for different cultures than European/African/Black/White/etc. Even today East Asians and North Americans will be considered "white people", depending on who has a bone to pick with who.
They are quite openly racist against the reptilian species secretly running the world however. Often very anti-semetic too.
Ah, but they were "uncivilized" Whites, and there's much more interest in the idea that African and Mesoamerican civilizations didn't build their monuments. It's quite obvious once you take off the "They're harmless!" blinders and look at what they're saying.
Here's photo evidence of a pyramid used as a landing pad: https://www.gateworld.net/wiki/Ra%27s_mothership.