The Egyptian pyramids are an elephant in the room. Conventional thinking is they're burial chambers built with copper tools and ramps.

But other historians believe they reflect a lost technological sophistication. The pyramids are incredibly precise: perfectly aligned to true north (within ~0.05°), made with millions of 2-70 ton blocks and precise internal engineering for passageways and chambers. Someone recently advocated that there's substantial subterranean infrastructure under the pyramids. The technology to move 70 ton blocks didn't exist again until the 1800's.

One of modern science's ideological straitjackets is Oliver Heaviside's restatement of Maxwell's 20 equations with 20 unknowns into four vector calculus equations. Heaviside's restatements made the math accessible to regular engineers who wanted to build things. But the restatements are arguably a simplification that neutered electromagnetism: https://x.com/TaxiCabJesus/status/1964345590604845487 (Grok had a nice answer for "what phenomenon are inadequately explained by Heaviside's four equations?").

The Coral Castle in Florida was a labor of love, built by a single man: https://en.wikipedia.org/wiki/Coral_Castle

  The stones are fastened together without mortar. 
  They are set on top of each other using their 
  weight to keep them together. The craftsmanship 
  detail is so fine and the stones are connected 
  with such precision that no light passes through 
  the joints. 

> Someone recently advocated that there's substantial subterranean infrastructure under the pyramids.

Ah yes, those giant subterran pillars beneath the pyramids. That actually interested me, so I decisively delved deeply into it, to do my due dilligence. Only to discover an early case of advanced AI-sloppery with no proven source at all. Completely made up.

And everybody copy pasting the shit! GRRR! :(