What tools did the ancient Egyptians use to build the great pyramids at Giza, still a mystery.
Let's review some of the theories scientists have made about how to build pyramids.
Giza's largest pyramid, dubbed the ancient world natural wonder, remains a great mystery to the world.
Data from Muyon County could help scientists find a secret chamber.
Physicists at the University of Amsterdam have just discovered a clever trick used by ancient Egyptians to transport heavy rocks during the construction of pyramids.
Contrary to the long-held concept, an English engineer claimed, the ancient Egyptian pyramids were rebuilt, inside and out.
The theory is that the Pyramid was built from huge blocks of rock that thousands of slaves dragged from the ground up high by a system of slopes that were no longer acceptable.
Archaeologists in Egypt unearthed two buildings dating to about 4,500 years old that are most likely related to the construction of the pyramids at Giza.
After making a hypothesis about how Egyptians built pyramids, construction company boss Chris Massey and his son did demonstration experiments.
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