Ground‑breaking Pyramid Radar Study Retracted Over Flawed Methods

In August 2024 the journal Remote Sensing announced a rare move: it was withdrawing a paper that had, for months, fed the imagination of pyramid‑obsessed internet users. The study, authored by Italian researchers Filippo Biondi and Corrado Malanga, claimed that synthetic‑aperture‑radar (SAR) Doppler tomography could see inside the Great Pyramid of Giza as clearly as a crystal, revealing corridors, shafts and even a mysterious “underground city.”

When the article first appeared in 2022, the idea seemed almost cinematic. Using satellite‑borne radar, the authors said they could detect minute vibrations—tiny wiggles caused by wind, distant earthquakes, even tourist foot‑traffic—that supposedly encoded the shape of hidden voids beneath the stone. Their figures showed a network of shafts spiralling down hundreds of metres, a large cavity that matched the “Big Void” previously spotted by cosmic‑ray muon scans, and a host of other features that ordinary archaeology had never documented.

Excitement grew fast. Blogs, YouTube channels and even a cameo by philanthropist‑creator MrBeast promised to fund an expedition to explore the alleged tunnels. Some commentators even began speculating about a second Sphinx lurking under the Giza plateau. The story became a meme, a headline, a bedtime story for anyone who loved a good mystery.

But the scientific community was less enthusiastic. Archaeologists pointed out that the paper never reported any on‑site verification, and that the authors had not obtained the necessary permits from Egypt’s Supreme Council of Antiquities. Radar specialists warned that SAR waves barely penetrate solid stone; they capture only what they directly “see,” not the faint echo of distant tremors. Lawrence Conyers, a veteran of radar‑based archaeology, summed it up bluntly: a satellite can’t reliably measure vibrations that small from orbit.

Things came to a head when an anonymous reader wrote to the journal, flagging “serious methodological flaws and statistical errors.” After an internal investigation, Remote Sensing concluded the concerns were substantial enough to retract the article on August 10, 2024. The retraction notice cited problems with the data processing pipeline, insufficient error analysis, and an over‑interpretation of noisy signals. The authors, Biondi and Malanga, publicly disputed the decision, but they never responded to follow‑up requests from Retraction Watch or Newsweek.

What does this mean for the pyramid mystery? In short, the spectacular claims about hidden chambers remain unproven. The only “big void” confirmed by independent research is the one discovered by muon‑detector experiments—a sizable cavity roughly 30 metres above the Grand Gallery, not a labyrinth of tunnels. Until a team gets permission to drill or scan the interior with proven methods, the radar‑derived maps stay speculative illustrations.

The episode is a cautionary tale about how quickly sensational science can spread online, especially when it involves iconic monuments. It also highlights the importance of peer review, replication and transparent methodology—things that cannot be replaced by eye‑catching graphics alone. As the dust settles, most Egyptologists are breathing a sigh of relief, reminding the public that while the Great Pyramid still holds secrets, we need solid, verifiable evidence before declaring we’ve uncovered an underground city.