Great Pyramid of Giza could be older than believed, new study finds

The Great Pyramid at Giza has long been a magnet for grand theories, but a recent paper has pushed that tendency into bold new territory: an engineer claims the monument could be tens of thousands of years older than mainstream archaeology accepts. The assertion has reignited debate online and in specialist circles, partly because it leans heavily on stone erosion patterns rather than the array of archaeological dating methods Egyptologists typically rely on.

The paper, authored by an engineer at the University of Bologna and circulated on ResearchGate, proposes that weathering on internal and formerly sheltered blocks points to a very ancient construction date. Critics say the idea sounds intriguing at first glance but unravels under closer inspection, leaving the pyramid’s conventional timeline intact for now.

What the new erosion-based analysis proposes

Alberto Donini, the study’s author, bases his argument on comparisons between blocks that were once protected by the pyramid’s smooth limestone casing and those long exposed to the elements. He measured differences in surface degradation and fed those measurements into a statistical model to estimate how long the stones had been exposed.

Key claims from the paper include:

• Modeled dates place the Great Pyramid’s construction somewhere in the broad range of 9000 BCE to 37,000 BCE.
• The study reports an average (mean) estimate near 23,000 BCE, and cites a roughly 68 percent probability for the wider bracket.
• From this, the author suggests an advanced pre-Holocene civilization could have existed in the Nile region capable of large-scale stone architecture long before the dynastic era.

Why many scientists are unconvinced

Skepticism among archaeologists and science journalists centers on the limits of using erosion as a clock. James Felton of IFLScience summarized the main criticism: the method may appear reasonable superficially, but relies on assumptions that are hard to defend across millennia.

Major issues raised include:

• Variable climate history: Egypt’s environment has alternated between wetter and drier phases, affecting rates of stone weathering.
• Micro-environmental differences: Sand burial, splash from seasonal rains, exposure to windblown grit, and human activity all create uneven erosion patterns.
• Loss of original casing: The pyramid once wore a polished limestone skin; reuse of those casing stones and later repairs complicate assessments of which surfaces were sheltered and for how long.
• Methodological assumptions: The model assumes relatively constant rates of weathering and comparable initial surface conditions—assumptions many specialists find unjustified over tens of thousands of years.
• Peer review status: The paper is currently available on ResearchGate and has not completed formal peer review, limiting confidence in its conclusions.

How the pyramids fit into the established archaeological timeline

Mainstream Egyptology places the construction of the Great Pyramid (often attributed to Pharaoh Khufu) in the Fourth Dynasty, around c. 2600 BCE. That placement isn’t arbitrary; it rests on multiple lines of evidence collected over decades.

Types of evidence supporting the conventional date

• Material culture: Pottery, tools, and settlement remains found in association with pyramid complexes demonstrate a clear technological and cultural continuity leading to the Old Kingdom.
• Inscriptions and historical records: Tomb inscriptions, king lists, and later historical references tie monumental building projects to a coherent dynastic sequence.
• Radiocarbon and organic remains: Charred wood, plant fibers, and other organic samples recovered from construction contexts have been radiocarbon-dated and align with the 3rd millennium BCE timeframe.
• Architectural evolution: The step pyramid at Saqqara and other pre-Giza structures show a gradual development of stoneworking skills and project scale that culminate with the Giza monuments.

What would be needed to overturn the consensus

Extraordinary claims require extraordinary evidence. For the notion of a 20,000–30,000-year-old pyramid to gain traction among specialists, researchers would need multiple, independently verified lines of proof:

• Peer-reviewed publications detailing methods, raw data, and error analysis for erosion modeling.
• Independent dating from secure contexts—radiocarbon, optically stimulated luminescence (OSL), or other chronometric techniques—directly associated with construction layers.
• Stratigraphic data and in-situ finds that clearly tie ancient materials to the building phase rather than later intrusions or repairs.
• Reproducible replication of erosion-rate experiments across different Giza blocks and comparable sites, addressing environmental variability.

Until those kinds of corroborating results arrive, the idea remains a provocative hypothesis rather than a replacement for the well-supported 3rd-millennium BCE model. The debate highlights how different scientific tools—geological modeling versus archaeological stratigraphy and dating—can yield competing narratives, and why cross-disciplinary scrutiny is essential as new claims about ancient monuments surface.

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William Anderson

William Anderson is a multimedia producer specializing in videos, podcasts, and interactive galleries. With five years of immersive content creation, he turns information into a rich audio‑visual experience. His storytelling skills draw you directly into the heart of every story, on any platform.