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The Great Pyramids of Giza are the last of the Ancient Wonders of the World still standing. And we recently learned a little bit more about these massive structures that have stood for 4,500 years.
A team of researchers have found a "void" inside Khufu's pyramid on the Giza platform above Cairo.
It is the latest major finding from the ScanPyramids project - a major noninvasive study launched in 2015 to try and uncover the mysteries of the pyramids .
Last year, the project identified two secret chambers , pointing to a network of corridors inside the great pyramid.
Rather than employ archaeologists to drill and dig into the structures, the project uses advanced physics to detect what lies beneath the stone surface without touching it.