If You Had a Time Machine...

[Mystic Wanderer]

I would go back to 701 and warn any in Europe who would listen that in 70 years an army led by a man named Charlemagne would sweep across the land forcing everyone to convert to Christianity or be put to death. Then I would teach as many blacksmiths as I could how to make steel. After that task, I would go back and find out who actually built the pyramids, ask what their purpose is, and how to use the technology.

Go the the bottom of my Cymatics thread and you'll see what the pyramids were used for.