Egypt Suddenly Halted a Giza Excavation — After MIT’s Scan Revealed Something Unexpected

The pyramids of Giza are among the most studied monuments on Earth, yet they continue to produce discoveries that keep major questions open. In the last few years, researchers have reported a hidden corridor inside the Great Pyramid, two newly detected voids behind the eastern face of the Menkaure Pyramid, and a buried L-shaped structure near the Western Cemetery at Giza. At the same time, older arguments about how pyramid stones were made or moved have returned to the spotlight.

What makes this moment especially striking is not just the discoveries themselves, but the gap between what science has confirmed and what has not yet been physically explored. Hidden spaces have been detected. Papers have been published. Yet several of the most intriguing findings remain unentered and unresolved.

The Menkaure restoration project that was halted

In early 2024, Egypt announced a controversial plan to reinstall fallen granite casing blocks around the base of the Menkaure Pyramid, the smallest of the three main pyramids at Giza. The proposal immediately drew criticism from archaeologists and conservation experts, who argued that reconstruction risked damaging or obscuring original evidence. A review committee led by former antiquities minister Zahi Hawass then halted the plan.

The committee’s core reasoning was blunt: it would be impossible to determine the exact original position of the granite casing blocks, which have lain scattered around the pyramid for thousands of years. That statement became one of the most discussed parts of the decision, because it suggested that even at one of the world’s best-known archaeological sites, experts could not confidently restore key architectural elements to their precise original locations.

A controversial theory about how pyramid stones were made

For years, materials scientists such as Michel Barsoum and colleagues have argued that at least some pyramid blocks may not have been purely quarried and hauled into place. Their published work proposes that certain stones may have been made from a kind of reconstituted limestone or geopolymer-like material. Their studies reported microstructural features they interpreted as evidence for an artificial stone-making process. Drexel University has summarized this work as evidence that parts of the Great Pyramids may have used an early form of concrete-like technology.

This remains highly controversial. It has not replaced the mainstream view that the pyramids were principally built from quarried stone. But the theory has not disappeared either. It has attracted renewed attention in part because MIT publicly highlighted a class project that tested whether a cast-limestone method could work in practice. MIT reported that students explored the idea by creating a small pyramid using both quarried and cast material.

That does not prove the Great Pyramid was poured like modern concrete. It does show that the idea has been taken seriously enough in scientific and engineering circles to be experimentally tested rather than dismissed outright.

Two newly detected voids in the Menkaure Pyramid

The strongest recent Menkaure finding is not the restoration dispute but a scientific one. In 2025, a team from Cairo University and the Technical University of Munich reported the detection of two air-filled anomalies behind the polished eastern facade of the Menkaure Pyramid. Their methods included ground-penetrating radar, ultrasonic testing, and electrical resistivity tomography, and all pointed to the same conclusion: the wall contains two man-made cavities immediately behind the outer surface.

The larger anomaly was reported as about 1.5 meters wide and 1 meter high, while the second measured roughly 0.9 by 0.7 meters. The researchers noted that these voids are directly behind a uniquely polished section of granite on the eastern side, a finish that resembles the stone treatment around the pyramid’s known northern entrance. They concluded that the hypothesis of a second entrance is plausible, though not yet proven.

This matters because the polished eastern face had long attracted interest from independent researcher Stijn van den Hoven, who argued that it might conceal a blocked entrance. The new paper did not confirm an entrance outright, but it did confirm that air-filled engineered spaces exist exactly where he believed something unusual should be.

The hidden corridor inside the Great Pyramid

In March 2023, Egyptian authorities and the ScanPyramids team announced a different but equally important discovery: a 9-meter-long hidden corridor inside the Great Pyramid of Khufu, located behind the chevron blocks above the main northern entrance. The corridor was identified using non-invasive techniques including radar and ultrasound, then confirmed through an endoscopic camera. The finding was published in a peer-reviewed study and widely reported by international media.

At the time of the announcement, officials said the corridor might help redistribute weight above the entrance or perhaps protect something deeper inside the pyramid. But beyond the initial reveal, there has been no major public follow-up describing a deeper penetration, a drilled opening, or a final conclusion about what lies beyond the end of the passage.

That silence is one reason speculation has flourished. The corridor is real. The endoscope images are real. But the meaning of the corridor remains unresolved in public.

The larger “Big Void” remains one of the biggest mysteries

Before the 2023 corridor announcement, ScanPyramids had already helped identify one of the most important hidden spaces ever detected in the Great Pyramid: the so-called Big Void above the Grand Gallery. That discovery, announced in 2017, was based on muon radiography and confirmed by independent teams using different detector technologies. The result was published in Nature, which gave it unusual scientific weight.

The Big Void is at least 30 meters long and has a cross-section similar to the Grand Gallery. What it is for remains unknown. It is not a chamber that has been entered. It is a detected void whose size and location are now part of the scientific record. That means one of the most famous buildings in the world still contains a major unexplained space high inside its structure.

The buried L-shaped structure near the Western Cemetery

In another recent development, archaeologists from Tohoku University, Higashi Nippon International University, and Egypt’s National Research Institute of Astronomy and Geophysics reported a buried L-shaped structure and deeper anomalies near the Western Cemetery at Giza. Their work suggested an L-shaped feature about 10 by 15 meters at shallow depth, with a larger anomaly below it. The researchers argued that the feature was unlikely to be natural.

This discovery is not inside one of the pyramids themselves, but it reinforces a broader point: even in the most intensively studied archaeological landscape in Egypt, there are still buried structures that modern remote-sensing techniques are only now beginning to identify.

The 2025 “underground city” claims are not established science

Not every dramatic Giza claim is on the same footing. In 2025, an Italian and Scottish team claimed that satellite radar had revealed vast underground structures beneath the pyramids. Those claims received heavy media coverage, but they have not been validated in the same way as the ScanPyramids corridor or the Menkaure anomaly paper. Major reporting on the radar claims emphasized that experts remained skeptical, that the methods had not been verified on-site, and that some Egyptologists considered the conclusions exaggerated or unscientific.

So while the phrase “underground city beneath the pyramids” made headlines, it should not be treated as equivalent to the peer-reviewed corridor and void findings. Those are very different levels of evidence.

Why all of this matters

The central reason these discoveries matter is simple: they show that Giza is not a closed case. The traditional image of the plateau as fully mapped and fully understood is no longer sustainable. There are confirmed hidden spaces in the Great Pyramid. There are newly detected voids in the Menkaure Pyramid. There are buried anomalies near the cemeteries. And there are still live scientific debates about ancient Egyptian materials and building methods.

At the same time, caution is essential. A hidden corridor is not automatically a secret chamber. A materials paper proposing artificial stone is not the same as proof that all pyramid blocks were cast. A radar anomaly is not yet a discovered underground city. The strongest position is not blind skepticism or sensational certainty. It is to distinguish clearly between what has been detected, what has been tested, and what remains unopened.

What happens next

For now, the biggest unanswered questions remain physical, not theoretical. Will Egypt authorize further exploration of the Menkaure eastern voids? Will the Great Pyramid’s hidden corridor receive deeper inspection? Will the Big Void ever be directly examined? And will enough high-quality material sampling ever be allowed to test competing theories about pyramid stone production at scale? Those are the next steps that would move the conversation from speculation to resolution.

Until then, Giza remains what it has always been: not just a monument to the ancient past, but a site where even now, with the best scanning tools on Earth, some of the most important doors are still closed.