Mysterious empty chamber found in the Great Pyramid of Giza
Scientists discovered a mysterious "void" inside the Great Pyramid of Giza, one of the oldest man-made structures on Earth.
It covers more than five hectares, stands 150 metres in height, and is built from nearly 2.5 million stone blocks.
In 2015, a team of international scientists — led by Medhi Tayoubi from an organization called ScanPyramids — used imaging techniques borrowed from a field of particle physics called muon tomography, to look deep inside the largest pyramids in Egypt. This included the Great Pyramid of Giza.
Just last year, they discovered a mysterious 30-metre long "void" inside the pyramid. There are various theories about the purpose of the void, including an earthquake prevention chamber, but for now, the exact function requires further investigation.