Researchers from Italy think they've 'confirmed' a hidden mega-city underneath the Pyramids of Giza.
Earlier this year, the scientists announced the discovery of a huge underground complex 3,500 feet beneath Egypt's Giza Plateau.
With the help of synthetic aperture radar Doppler tomography - a radar imaging method - they think they can confidently solidify their theory.
So as the radar moves, objects cause tiny changes in frequency, known as Doppler shifts.
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By collecting these changes from many angles, the system can rebuild a detailed picture, much like putting together slices to form a full image.
Radar engineer Filippo Biondi developed the method, which, he claims, makes it hard to doubt the discovery.
Speaking on Jesse Michels' American Alchemy podcast, he explained that satellite operators, Umbra, Capella Space, ICEYE and Italy's Cosmo-SkyMed all came back with the same data.
"All four satellites gave exactly the same results," Biondi said.
"That is really amazing. We cannot announce anything without these basic scientific methods."
The scans show eight massive hollow shafts plunging straight down beneath the Khafre pyramid. The shafts end more than 3,500 feet below the plateau in huge cubic chambers measuring 260 feet per side, surpassing the size of many sports stadiums today.
"The pyramids are the tip of the iceberg," Biondi declared. "It's just a hat to complete something that is located underneath. The substance is below."
Biondi also addressed the findings which showed a spiral-like structure around the shafts.
"I can say that this structure, the tubes extending beneath the pyramid, seems to be related to information," he admitted.
"Generating energy is a kind of information. Information is everything."
Back in March, however, Egyptologist Zahi Hawass rubbished Biondi's claims, calling the whole thing 'fake news'.
On his Facebook page, he argued: "I would like to make a statement regarding the news that was published all over the world by a group of amateurs. The news was under the pyramid of Khafre at Giza they found a platform topped with pillars.
"All this information is completely wrong and has absolutely no scientific basis. In addition, the Ministry of Tourism and Antiquity did not give permission to any individuals or institutions to work inside or outside the second pyramid."
Dr Hawass added: "In addition, the claim that a radar was used inside the pyramid is false.
"These people who announced this wrong information, they used techniques that are not approved nor validated, the details announced would never have been seen by using this technique."
Anish Vij