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"This was an advanced civilization. I see a little copyright symbol."
"It goes on to say 'We use petroleum to light our laps, and to heat our food, but we can't seem to come up with an internal combustion engine'."
'Just another example as if one was needed at the relentless march of civilisation!'
"How did our civilization become so advanced? Our kids only get two weeks off from school in the summer."
The pyramids were built using advanced alien knowledge.