A new development in the mystery of a purported city beneath Egypt's Giza pyramids could, if proven true, fundamentally reshape our understanding of human history.
Italian researchers told DailyMail.com that not only are the shafts and chambers deep below the Khafre pyramid 38,000 years old, but also the Giza complex.
The Giza complex, consisting of the Khufu, Khafre and Menkaure pyramids, is widely believed to have been constructed around 4,500 years ago.
They proposed a pre-existing civilization built the complex, but was destroyed around 12,000 years ago by a 'divine flood' triggered by an asteroid impact that left only the pyramids as the surviving 'megastructure.'
Mei, who visited the site two weeks ago, highlighted physical evidence, saying: 'Some blocks near the Great Pyramid's entrance show clear signs of water erosion.'
'Only certain stones are affected, suggesting part of the pyramid was submerged in ancient times,' he added.
Mei also highlighted how thick salt encrustations have been found inside the Great Pyramid, which he interprets as proof of the ocean once flooded the Giza Plateau.
Dr Zahi Hawass, Egypt's former Minister of Antiquities, has consistently argued that the features some interpret as water erosion at the base are due to natural weathering processes and the salt originated from the limestones themselves.
Italian researchers told DailyMail.com that not only are the shafts and chambers deep below the Khafre pyramid 38,000 years old, but also the Giza complex
'The enduring enigma of the Giza pyramids stands as a powerful and perplexing testament to this possibility,' said Mei.
'Despite extensive research, the precise methods employed in their construction remain a subject of intense debate and speculation.'
He added that the 'logistical and technical capabilities required to quarry, transport, and precisely position multi-ton granite blocks, some of considerable dimensions, from distant locations like the granite quarries nearly 500 miles from Giza, warrant deeper and serious scientific inquiry.'
Mei and his team, which includes Corrado Malanga from Italy's University of Pisa and Filippo Biondi with the University of Strathclyde in Scotland, took the world by storm last month when they discovered shafts and chambers more than 2,000 feet below the surface.
They also identified chamber-like structures more than 4,000 feet underground, which they speculated could be a long-lost city.
The work has not yet been published in a journal where outside experts can review it.
The discovery was made by collecting acoustics from deep in the ground, including seismic waves, noise from human activity and photon interactions, to map the newly found shafts and chambers that extend more than 2,000 feet below the surface.
Biondi said these waves were collected by radar, specifically by analyzing Doppler centroid abnormalities—shifts or distortions in frequency patterns used to detect underground structures or changes.
However, Hawass told The National: 'The claim of using radar inside the pyramid is false, and the techniques employed are neither scientifically approved nor validated.'
Mei (center) and his team, which includes Corrado Malanga (right) and Filippo Biondi (left), took the world by storm last month when they discovered shafts and chambers more than 2,000 feet below the surface.
Researchers believe there are other structures reaching more than 4,000 feet below the surface. The scans captured structures extend along the northern side with a tuning fork shape
Now, the latest development from the Italian researchers is that the Giza pyramids also pre-date the oldest known man-made structure of its kind by tens of thousands of years, which is the Göbekli Tepe in Turkey.
The team based their claims on the 2001 theory known as the Younger Dryas, which is not a widely accepted theory within the scientific community, and is often viewed as a fringe theory.
'Scientists have stated that there aren't clues of an impact on Earth,' Mei said.
'But the Earth is 80 percent ocean. So it's possible that the impact was in in the ocean, and water destroyed the preceding civilization that lived on Earth.'
He added that there are many signs across the world that suggest the existence of a preceding civilization, such as similar monuments in South America and China, 'even at Norfolk Island.'
'But not only the monuments, even the myths are similar everywhere in South America, in Europe, Africa and the South Pacific. There are legends that are similar to the other myths all around the world,' said Mei.
Biondi explained that the pre-existing civilization in Egypt built the city first, then the shafts and then the pyramid on top, creating a 'megastructure' which were buried following the great flood.
The salt encrustations inside the Great Pyramid, according to the team, were left behind from ocean water flowing into the structure.
Colonel Howard Vyse explored the pyramids' King’s Chamber in 1837, finding thick layers of salt on the limestone roof-stones in areas above the chamber.
The said the technology captured enormous chambers (pictured) in the middle of the shafts
The team claimed they discovered eight cylinder-shaped structures below the Khafre, which travel more than 2,100 feet below the pyramid's base. They identified spiral structures on the sides of the shafts
He described these as crystalline deposits, later identified as sodium chloride, forming delicate, flower-like patterns.
W.M. Flinders Petrie also surveyed the Great pyramid in the 1880s, finding thick salt encrustations (up to half an inch) on the limestone walls of the Queen’s Chamber and the Horizontal Passage.
However, he did not report similar findings as Vyse inside the King’s Chamber.
'The tunnels that goes in the underground of Giza have exactly the same feature presence of salt on the walls,' Mei said.
'Now, it means that something happened in the ancient past that we must better understand.'
Not only has the team used 'physical evidence' to support their claims, but also ancient Egyptian text that they said 'refers to an ancient civilization.'
Mei explained that the theory of the lost city is based on ancient Egyptian texts, specifically Chapter 149 of the Book of the Dead, which refers to the 14 residences of the city of the dead.
The shafts were said to be connected to larger, cubic structures. The team said there could be a hidden city below all three pyramids
'It describes certain chambers and some inhabitants of the city. That is why we believe it could be Amenti, as described in ancient texts,' he said.
'Of course, we must be certain, but we believe this could be the case because the pyramids are located exactly where the texts say.
'The texts state that the pyramids were built on top of the city, sealing its entrance.'
Biondi also noted that the unknown chambers more than 4,000 feet below the pyramid could be related to the legendary Hall of Records.
The Hall of Records is a long-standing myth in Egyptian lore, believed to be a hidden chamber beneath the Great Pyramid or the Sphinx, containing vast amounts of lost wisdom and knowledge about ancient civilizations.
However, there is no reliable evidence proving its existence.
Professor Lawrence Conyers, a radar expert at the University of Denver, who specializes in archaeology and was not involved in the study, said the claims that the pyramids and structures were built 38,000 years ago are 'outlandish.'
He added that at that time in human history people 'were mostly living in caves' 38,000 years ago.
'People did not start living in what we now call cities until about 9,000 years ago,' he said.
'There were a few large villages before that but those only go back a few thousand years from that time.'
However, Mei said: The notion that a civilization limited to rudimentary tools such as wooden mallets and copper chisels – implements seemingly inadequate for such monumental tasks in hard stone – could have achieved this level of engineering mastery demands a more robust and scientifically sound explanation than the often-cited, and frankly unconvincing, theory of water-soaked wooden wedges.
'The archaeological community really ought to start seriously addressing these fundamental questions, perhaps by first gaining a more practical understanding of the actual techniques required to extract colossal granite blocks from quarries, before proclaiming hypotheses that completely lack technical and scientific grounding.'