A team of Italian scientists left the world astounded last March when they revealed the discovery of a massive underground network extending nearly 3,500 feet below Egypt's Giza Plateau, linking chambers reportedly the size of city blocks.

Now Filippo Biondi - the radar engineer who developed the imaging method - has stepped forward with what he claims is persuasive proof.

During a recent interview on Jesse Michels' American Alchemy podcast, Mr Biondi disclosed that four separate satellite operators - Umbra, Capella Space, ICEYE, and Italy's Cosmo-SkyMed - each generated identical raw tomography data pointing to the same underground formations.

Mr Biondi said: "All four satellites produced exactly the same results. That's truly remarkable. We can't announce anything without these fundam

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