The Greeks had a word for it.
Proselene. Before the Moon. The term appears in multiple classical sources referring to the Arcadians and the Pelasgians, the pre-Hellenic populations of Greece, who maintained the tradition that their ancestors had inhabited their territories in the period before the Moon existed in the sky. Apollonius of Rhodes, writing in the third century BCE, describes the Arcadians as having lived before the Moon, eating acorns on the mountains before the birth of Selene. Stephanus of Byzantium’s Ethnica preserves the same tradition, identifying the Pelasgians as Proselenes, people of the pre-lunar period.
These are not the only classical references. Aristotle in Meteorologica discusses astronomical traditions that include a period before the Moon’s presence. Plutarch in Moralia discusses the Proselenes explicitly, treating the tradition as a historical claim rather than a mythological one. Democritus and Anaxagoras addressed the Moon’s origin in their cosmological writings in ways that treat it as a distinct arrival event rather than as a primordial feature of the sky.
Five named classical philosophers and historians, working from independent sources across a period of several centuries, all referencing a tradition that the Moon arrived at a specific historical moment within human memory. The tradition is consistent enough across these independent classical sources to have generated a specific Greek vocabulary for the people who lived before it arrived.

This tradition is not uniquely Greek. The same tradition appears, independently, on four other continents.
The Bogota Highland Tradition
The indigenous peoples of the highland region around Bogota in Colombia maintain an oral tradition that describes the world before the Moon’s arrival in terms whose specific content is consistent with the Greek Proselene tradition despite the absence of any documented contact between the two traditions.
The Colombian tradition describes a pre-lunar world in which all life was larger than at present: trees, animals, birds, and humans all grew to dimensions that the Moon-present world does not support. The tradition attributes the reduction in biological scale to the Moon’s arrival, which changed the atmosphere in ways that made the previous growth scales impossible to maintain.
The specific timing indicated in the tradition, approximately nine to ten thousand years ago, falls within the Younger Dryas to early Holocene period, the period of the most significant post-glacial transition documented in the geological record. The Younger Dryas, dated to approximately 12,900 to 11,700 years ago, was a period of abrupt climate reversal, the return of near-glacial conditions during the post-glacial warming, that produced major changes in flora, fauna, and human population across the planet. Whether the Colombian tradition’s timing reflects this period or a different specific event is not established, but the general epoch is consistent with a major planetary transition.

The specific claim that the Moon appeared overnight rather than through a gradual process is the most extraordinary element of the Colombian tradition. It is also the most consistent with the physical Hollow Moon hypothesis documented in this library’s dedicated piece: an artificial structure placed in orbit rather than a body that accreted over geological timescales would appear suddenly rather than gradually.
The Colombian tradition does not describe the Moon’s arrival as a natural event. It describes it as something that happened to the world, changing it in ways that its inhabitants experienced as catastrophic.
The Tiwanaku Calendar
The ruins of Tiwanaku in Bolivia, one of the most significant pre-Columbian archaeological sites in South America and a site whose origins and dating remain contested within the Andean archaeological community, contain astronomical alignments whose implications connect to the pre-lunar tradition.
Arthur Posnansky, a Bolivian-German archaeologist and engineer who spent decades studying the Tiwanaku site in the early twentieth century, published a four-volume analysis of the site’s astronomical alignments between 1945 and 1958. His specific methodology was to calculate the astronomical epoch to which the site’s primary alignment corresponded, using the known rate of change of the Earth’s obliquity to work backward from the current alignment to the original calibration date.
His specific conclusion was that the site’s primary astronomical alignment was calibrated to an epoch approximately 15,000 to 17,000 years before the present, significantly older than the conventional Tiwanaku dating of approximately 1500 BCE to 700 CE. Posnansky’s calculation has been disputed by subsequent archaeoastronomers who argue that his methodology contains specific errors and that a corrected calculation produces a later date more consistent with the conventional archaeological dating.
Whether Posnansky’s specific date is accurate or not, the tradition associated with the site’s astronomical function includes the claim documented in the source: that the Tiwanaku astronomical calendar recorded a period when the year was 290 days long. A year of 290 days is inconsistent with the Earth’s current orbital period but could reflect a different astronomical configuration of the Earth-Moon system, in which the Moon’s gravitational influence on the Earth’s rotation and axial dynamics was different from the current configuration.

The Moon’s presence significantly affects the Earth’s rotational dynamics and axial stability. The Earth’s axial tilt is stabilized by the Moon’s gravitational influence. Without the Moon, the Earth’s axial tilt would be significantly more variable on geological timescales, producing climate variability far greater than what the current Moon-stabilized system generates. Whether the Earth’s rotation rate would be different in the absence of the Moon depends on the specific angular momentum of the pre-lunar Earth-Moon system, which is not calculable from the traditions alone.
The 290-day year claim is consistent with a higher Earth rotation rate in the pre-lunar period, which tidal interactions with the Moon have gradually slowed over time. The Earth’s rotation rate has been decreasing throughout the geological record, measurable in the daily growth bands of ancient corals, and the current rate reflects billions of years of lunar tidal braking. A significantly faster rotation rate in a hypothetical pre-lunar period is physically plausible, though whether it would produce a 290-day year at the relevant epoch is a calculation that requires specific assumptions about the pre-lunar angular momentum.
The Indian and Chinese Traditions
The Indian tradition of an artificial Moon constructed by divine agency and placed in orbit for a specific purpose is documented across multiple Sanskrit texts in the Puranic tradition. The Hollow Moon piece in this library covers the physical aspects of this tradition. Its connection to the pre-lunar Earth traditions adds the temporal dimension: the tradition is not that the Moon is ancient and was always there in its artificial form. It is that the Moon was constructed and placed deliberately at a specific moment in the history of the divine-human relationship.
The specific stated purpose in the Indian tradition, that the Moon was placed to close portals through which malevolent entities were accessing the terrestrial realm, connects to the broader framework of the Watchers and Nephilim pieces in this library. Whether the portals being closed are the magnetic reconnection points documented in the NASA portal piece, the specific geographic vortex points documented in the Sanderson icosahedral geometry, or something else entirely that the available framework cannot fully characterize, is a question the traditions raise without resolving.
The Chinese tradition preserved by the monk Yu Bao Zi, writing in the fourth millennium BCE from sources he describes as significantly older than himself, connects the Moon’s arrival to changes in agricultural productivity and to the disruption of an existing calendar system. The agricultural productivity claim is consistent with the Colombian tradition’s description of a reduction in biological scale. The calendar disruption claim is consistent with the Tiwanaku tradition’s description of a pre-lunar year of different length. The consistency across three independent traditions from three continents in their specific descriptions of what the Moon’s arrival changed is the pattern that the convergence argument treats as significant.

The Egyptian tradition of pre-lunar time is the least developed in the available record, appearing in contexts that Egyptologists classify as mythological rather than as historical claim. The Hollow Moon piece’s connection to the Egyptian gods of the First Time tradition provides the relevant context: the Egyptian tradition of beings who arrived with technology and a civilizational mission in the Zep Tepi period connects to a pre-dynastic era whose astronomical configuration may have been different from the current one.
What Planetary Science Says About the Moon’s Origin
The Giant Impact Hypothesis is the dominant mainstream account of the Moon’s formation. It proposes that approximately 4.5 billion years ago, a Mars-sized body designated Theia impacted the proto-Earth at a specific angle, and the debris from the impact coalesced into the Moon over a period of thousands to tens of thousands of years.
The hypothesis has several specific strengths: it explains the Moon’s relatively low density, which is consistent with material from Earth’s mantle rather than from Earth’s iron-rich core. It explains the Moon’s orbital characteristics. It explains the general similarity between lunar and terrestrial material.
It has specific documented problems that the planetary science community is actively working to resolve.
The most significant problem is the isotopic composition similarity between lunar and terrestrial material. Different bodies in the solar system formed from material with slightly different isotopic signatures, reflecting the specific mix of presolar material and stellar nucleosynthesis products that condensed in different regions of the protoplanetary disk. Earth and the Moon show an unusually high degree of isotopic similarity, including in oxygen, tungsten, silicon, and other elements whose isotopic ratios are typically used to distinguish between bodies from different parts of the solar system.

If Theia was a body from a different part of the solar system, as the Giant Impact Hypothesis requires, it should have had a different isotopic signature that would appear in the Moon’s composition. The Moon’s composition is instead almost indistinguishable from Earth’s. This is the isotopic paradox that several research groups have proposed modifications to the standard Giant Impact model to address.
The proposed modifications include scenarios in which Theia formed in the same orbital zone as the Earth, producing isotopic similarity. They include scenarios in which the impact was more energetic than the standard model proposes, completely vaporizing and mixing both bodies’ material before recoalescence. They include scenarios in which the impact was significantly more oblique, producing a different initial disk distribution.
None of these modifications has resolved all of the compositional anomalies simultaneously. The Moon’s origin remains the most actively debated question in planetary science whose resolution is not considered settled.
This is the mainstream planetary science context within which the pre-lunar traditions and the Hollow Moon physical anomalies exist. The Moon’s origin is contested in planetary science. Its physical properties are anomalous in the ways the Hollow Moon piece documents. Multiple independent ancient traditions describe its arrival within human memory.
The three lines of evidence are independent. They converge on the same conclusion: something about the conventional account of the Moon’s origin is incomplete.
The Younger Dryas and the Timing
The pre-lunar traditions that provide specific timing place the Moon’s arrival at approximately 9,000 to 10,000 years ago. The Greek Proselene tradition associates it with the period of the Pelasgians, the pre-Hellenic population, which the archaeological record places in the third to seventh millennium BCE. The Colombian tradition specifies approximately 9,000 to 10,000 years ago. The Tiwanaku tradition does not specify a date but connects the pre-lunar calendar to a period whose astronomical parameters were different from the current ones.

The geological period associated with these dates is the transition from the Younger Dryas to the early Holocene, approximately 11,700 years ago, and the subsequent early Holocene period of rapid sea level rise and civilizational disruption that the Lost Civilizations and Atlantis pieces in this library document from the perspective of what was lost.
The specific planetary changes that would result from the Moon being placed in orbit at this period are calculable in general terms. The tidal forces immediately following a major addition to the Earth-Moon system would be significantly larger than the current tidal forces, because the orbital stabilization process would take time. Large tidal forces in the immediate post-placement period could produce the flooding traditions that appear globally in the post-Younger Dryas record. The specific global flood traditions from this period, the Plato-derived Atlantis account, the Sumerian flood narrative, the Noachian flood, and dozens of independent cultural flood memories from this epoch, could reflect the tidal consequences of the Moon’s orbital insertion at this period.
The Hollow Moon piece’s physical evidence, the bell resonance, the crater anomalies, the mascon distribution, is consistent with an artificial structure. The pre-lunar traditions’ timing places the arrival within the same epoch as the global flood traditions. The planetary science’s inability to fully explain the Moon’s isotopic composition through the standard Giant Impact model leaves the origin question open.
The convergence of these three independent lines of evidence, physical anomaly, ancient tradition, and planetary science uncertainty, does not prove that the Moon was artificially placed in Earth orbit approximately ten thousand years ago. It establishes that the question of how the Moon arrived deserves treatment as a genuinely open research question rather than as a settled matter whose only unresolved details are in the fine print of the Giant Impact model’s isotopic paradox.
The Pre-Selenites and What They Knew
The Arcadians who called themselves Proselenes were making a specific historical claim: their civilization predated the Moon’s arrival. This was not a mythological statement about cosmic time. It was a claim about human memory of an astronomical event.
The specific astronomical event they were claiming memory of would have been one of the most spectacular events in human perceptual history: the appearance of a Moon-sized object in the sky where no such object had previously existed. Whether it appeared over days or hours or overnight, as the Colombian tradition suggests, its arrival would have been visible to every human being on the planet with access to a clear night sky.

The tidal, atmospheric, and gravitational consequences of that arrival would have been experienced by every organism on Earth. The Colombian tradition’s description of everything becoming smaller after the Moon’s arrival reflects a real physical relationship: the Moon’s gravitational influence on Earth’s tidal forces, rotational dynamics, and atmospheric structure would have changed the conditions under which terrestrial life operated.
The traditions that describe this change are consistent across five independent cultural contexts. The change they describe is physically plausible as a consequence of the Moon’s placement in orbit. The physical evidence of the Moon’s anomalous properties suggests it may not be the naturally accreted body the Giant Impact model describes.
The Proselenes remembered a sky without the Moon. The planetary scientists have not explained where the Moon came from. The physical evidence suggests it is not what the standard model says it is.
Three independent conclusions from three independent evidentiary traditions. They are pointing at the same gap in the official account.