David7204 wrote...
That doesn't need any explaining at all, actually. The pyramid is the most stable structure that be built high. It's therefore likely that pretty much any and every intelligent life in existence will build pyramids at some point.
Well...the connection with the Egyptians was clearly an obvious one with the art style and what not.
As for your point, the Egyptians and the Protheans built the same style of Pyramid. (square Base, sloping sides)
Other cultures on Earth, i.e. Mayans, Aztecs did not build their pyramids the same way the Egyptians and the Protheans did. (Layers)
The connection, most probably, was deliberate.