They sent probes. The probes landed in Egypt. They changed into machines that scurried like crabs across the sand. Huge, robotic crabs that could easily crush a man if needed.
Thankfully, they didn’t seem interested in man. Instead, they turned sand and sea water into stone. That stone was used to construct huge buildings for their creators.
Then, they left. Their creators never came.
Soon, man would discover the key to working these huge stacks of stone. The gears would remain a mystery, but man would claim these pyramids as his own, built in his honour.
The machines, and their creators, would be forgotten to history.