A researcher claims the Great Pyramids may predate ancient Egypt and could be the work of a lost civilization with advanced engineering.

The pyramids may have been built using a sophisticated hydraulic system, according to a new study in Egypt. Evidence of ancient Egyptians using water pressure to lift stone blocks was discovered at ...

The pyramids of Giza are among the oldest monumental stone buildings ever created, and also contain the two tallest ancient pyramids in the world. The Great Pyramid - the tallest among the trio - is ...