[jjtheblunt]

how were they built?

[bckr]

"... labourers were recruited from farms, perhaps from a region much further down the Nile, near Luxor.

The labourers would have been enticed by the mix of high-quality food and the opportunity to work on such a prestigious project."

https://www.sciencefocus.com/science/were-the-egyptian-pyram...

[artificial]

By teams of people stacking enormous stones on top of one another. Fun fact, there's inscriptions by the teams.

[nvr219]

Aliens.