how could the egyptians build the piramids?

Answer 1

One imaginative theory has been proposed by geochemist Joseph Davidovitz in his book "Book of Stone". According to his findings, the Egyptians invented concrete, which they formed out of limestone. They liquefied the limestone with some caustic chemical, and then poured the concrete into plywood molds. This is how they formed 80 ton blocks atop many dozens of stories above the ground. Apparently, plywood was developed by the Egyptians. So this theory doesn't require thousands of slaves, ramps, beasts of burden to haul huge stones from the quarry. The rock was liquefied on site and then several hundred men could carry baskets of the stuff up to the newest level and pour it in the molds.

Davidovitz suggests that this tech. inspired the Greeks to call Egypt, the land of alchemy.

For various reasons, Egyptologists have doubted this theory, perhaps because it took a geochemist to make the discovery, not an archaeologist.

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Answer 2

The Great Pyramids have been called one of the wonders of the world for a very good reason. Engineers for centuries have been wondering how they did it and we are still wondering how they could have done it. Likewise the massive stone structures of the ancient natives of South and Central America are also wonders.
We in our modern space-age vanities are reluctant to give the ancients credit for possibly being smarter than us. So we attribute their unexplainable wonders to the works of aliens and other such nonsense.

Answer 3

They couldn't. The Pyramids were built by aliens from space.
I met Elvis at Strabucks last night and he told me all about it. Oh, and he asked to say "hi" to you.

Answer 4

Lots and Lots of slave labor...