Hidden for 4,500 years: a sealed corridor in the Great Pyramid

The ScanPyramids team found a sealed corridor inside the Great Pyramid of Khufu — about 9 meters long, 2.1 meters wide, sitting 7 meters above the main entrance and hidden for roughly 4,500 years, reports Modern Engineering Marvels. The discovery started with muography, a technique that tracks muons generated by cosmic rays passing through stone. — Read the rest The post Hidden for 4,500 years: a sealed corridor in the Great Pyramid appeared first on Boing Boing.