>>515155922
>They built them to last a long time but why?
The Pyramids are very large machines that produce chemical products, these chemical products like these acids were mainly used for a process called leach mining.
that way they could get all the metals they need from iron to gold, silver, titanium etc. from the underground mines.
the Giza site is geologically very interesting and there is lots of gold and other shit down there.
to extract all the gold and the other metals these structures needed to be permanent and they needed to produce large amounts of these acids.
and they basically do it for free, atmospheric and telluric electric currents power it for (almost) free.
>What was the gold used for?
are you seriously asking why Gold is valuable?
>did all of the other pyramids have such functionality?
different pyramids produced different chemical products as I have explained in an earlier post.

>>508647992
>unproven angles
its literally all backed by hard physical evidence.
>nothing exists today, built in any real relatable way
the chemical reactions are still the same, they just use a different energy source and still produce the same chemical products for the same usecases.
>They didn't need a "manufacturing sector," for chemicals
yes of course they needed it, every advanced civilization has a chemical industry.
>because there wasn't 8 billion people
if you wanna make more people and expand you gonna need chemistry, thats why the Haber Bosch process started the population explosion and the Haber Bosch process comes from ancient egypt.
>any type of functioning economy
they knew what gold is.