Egypt is opening up its 4,600-year-old 'bent' pyramid and letting people go deep inside its chambers

The pyramid, built for Pharaoh Sneferu around 2,600 BC, was built "bent" because the ground underneath wasn't stable.
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Ancient 4,500-year-old pyramid may hide a secret doorway

The Great Pyramid at Giza has been studied for centuries, yet new scans of the 4,500-year-old monument suggest it may still be hiding a concealed passageway that functions like a secret doorway. Fresh ...