So the technology has improved quiet a bit since then, now they are using muon scans! But I think they might have just been referring to hidden chambers in the

So the technology has improved quiet a bit since then, now they are using muon scans! But I think they might have just been referring to hidden chambers in the places we know about https://spectrum.ieee.org/tech-talk/aerospace/astrophysics/muon-imaging-finds-hidden-chamber-in-great-pyramid-of-giza https://spectrum.ieee.org/tech-talk/aerospace/astrophysics/m...