Cosmic rays reveal ‘hidden’ 30-foot corridor in Egypt’s Great Pyramid

Cosmic rays and endoscope photos have revealed a “hidden” corridor inside the Great Pyramid of Gizaon its northern face, above the ancient entrance of the pyramid, new research discovers.

The Great Pyramid was built by order of Pharaoh Khufu (ruled ca. 2551 BC to 2528 BC) on the Giza Plateau and today stands about 456 feet (139 meters) tall. It is the only one that survives wonder of the ancient world and was the tallest building on Earth until 1311, when the 525-foot (160 m) central tower of Lincoln Cathedral, England, was completed.

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