Leads
The open cases, ranked
Unresolved anomalies ordered by how closely their evidence at the time resembles past vindications, each with the test that would settle it. A prioritization, not a probability.
11Open
0Partial
| Case | Decisive test | Evidence then | Leap | Years open | Stake | |
|---|---|---|---|---|---|---|
| 1 | White Sands footprintsHuman footprints in an ice-age New Mexico lakebed, dated to ~23,000–21,000 years ago; the dates are disputed. | Medium costOSL-date sediment directly above and below several track horizons (single-grain quartz or feldspar), blind, at a lab outside both camps, with water-content history modelled. | 6.5/8 | 1.3× | 5 | no |
| 2 | Jebel IrhoudSkulls once read as Neanderthal; dated in 2017 to ~315,000 years and proposed as earliest H. sapiens. | Medium costAttempt enamel protein sequencing on an Irhoud tooth, as done for Homo antecessor (Welker et al. 2020), to help place Irhoud relative to Neanderthals and H. sapiens. | 6/8 | 1.6× | 9 | no |
| 3 | Madjedbebe (Malakunanja II)Tools in a northern Australian rock shelter that may put people in Australia 65,000 years ago. | Medium costSearch archived Phase 2 material for identified charred Pandanus endocarp or intact hearth charcoal, then AMS-date it (ABOx-SC) at two labs; a 1989 hearth sample there already failed pretreatment at ANSTO. | 5.5/8 | 1.3× | 9 | no |
| 4 | Cerutti Mastodon siteBroken mastodon bones beside heavy cobbles in a San Diego freeway cut, dated to about 130,000 years ago. | Low costThin-section the carbonate crusts on CM fracture surfaces, and U-series date them where feasible, to see whether the crusts grew over the breaks. | 4.5/8 | 8.7× | 9 | no |
| 5 | HueyatlacoStone tools near Puebla found with bone dated to ~245,000 years, an age the excavator herself rejected. | Medium costClean the Hueyatlaco section, log whether units C and E are primary beds or channel fill, and date them directly: AMS 14C on in situ shell or bone and post-IR IRSL on feldspar. | 4/8 | 18× | 57 | no |
| 6 | Great Sphinx Weathering ControversyDeep weathering around the Great Sphinx, read by a geologist as a sign it was carved millennia before Khafre. | High costPaired 36Cl depth profiles with measured Cl (10Be dating of carbonates often fails) in the enclosure walls and in bed-matched 4th-Dynasty quarry faces and dated masonry with the same sand burial and salt history. | 3.5/8 | 1.8× | 35 | unknown |
| 7 | Topper SiteA South Carolina chert quarry where pieces in sediment over 50,000 years old may be tools or natural breaks. | Medium costDate the sands of the artifact-bearing terrace level by luminescence (OSL/IRSL) for a finite burial age, after checking whether S1 already reports such ages. | 3.5/8 | 3.4× | 22 | no |
| 8 | Meadowcroft RockshelterA Pennsylvania rockshelter with charcoal dates of up to 19,000 radiocarbon years, long before Clovis. | Medium costSingle-fragment AMS dates on botanically identified charcoal from lower Stratum IIa features, run at an independent lab, with reflectance checks for coal on the same samples. | 3.5/8 | — | 49 | no |
| 9 | Gunung PadangA claimed Ice Age pyramid inside a Javan megalith hill; the paper was retracted in 2024. | Low costPublish depth and context records for the 12 dated samples, and have outside archaeologists examine the small artifacts the authors say accompany Units 1–3. | 3/8 | — | 13 | yes |
| 10 | Tecaxic-Calixtlahuaca "Roman head"A Roman-looking clay head from a Mexican burial dug in 1933; its date, context and origin are all disputed. | Medium costWith INAH permission, re-date the head by TL or OSL at a second laboratory and publish the raw data; check feasibility first, since the 1995 test gave no standard TL determination. | 2.5/8 | — | 66 | unknown |
| 11 | Bluefish CavesYukon caves whose cut-marked bones may place people in North America at the height of the last Ice Age. | Medium costBlind re-study of the 15 cut-marked and 20 'probable' bones at the Canadian Museum of History by an independent taphonomy lab, using 3-D micro-morphometrics. | 2/8 | 2.1× | 44 | no |
| 12 | Boqueirão da Pedra FuradaA Brazilian rock shelter where charcoal and flaked pebbles may place people 30,000+ years ago. | Medium costBlind test: independent lithic analysts sort archived Pleistocene pieces mixed with cobbles broken by rockfall and runoff below the same cliff and by capuchins in the park. | 2/8 | 3.3× | 42 | no |
- Rank = evidence profile (eight positive features; yes = 1, partly = ½), ties broken by the smaller leap. A validated model replaces it once the catalog is large enough.
- Leap = claimed age ÷ the accepted limit when the claim was made. Past vindications mostly stepped modestly (hypothesis H1).
- Stake = a documented commercial, religious, nationalist or fame motive (hypothesis H6).
Megalith dating leads hypothesis H7
Of 40 major megalithic monuments, only one has a direct date of its stonework; most ages are inferred from material found nearby, texts or style. These are the monuments where a first direct date would matter most — in either direction.
1Direct
25Associated
5Texts
6Style
3No date
| Monument · current dating | Direct method | What a result would mean | Sources | |
|---|---|---|---|---|
| 1 | Gunung PadangNo accepted date for the megalithic terraces. A 2023 claim of construction from 9,000+ years ago was retracted in 2024 because the 14C dates were on soil not tied to any artifact or anthropogenic feature. · none | Rock-surface luminescence burial dating of the underside of stone columns that are demonstrably set in place on the upper terraces (the face was covered at placement), plus single-grain OSL on sediment sealed immediately beneath the same stones. AMS 14C only on organics inside features shown in section to be built.Lower faces of placed stone columns, and the sediment directly under them, on the surface terraces. The first requirement is a documented built interface, which is exactly the point the retraction turned on. | If older: An early-Holocene or older age from a demonstrably built context would be a genuine anomaly. It would need independent-laboratory replication and a hunt for mundane causes (inherited signal, incomplete bleaching, stones re-set onto older sediment). If younger: A late-Holocene placement age would confirm the ordinary reading of a later prehistoric terraced site and close the buried-pyramid claim on evidence rather than on authority. | Retraction: Geo-archaeological prospecting of Gunung Padang buried pre Bailiff, I., Andrieux, E., Diaz-Guardamino, M., Alves, L. et al. (2024 |
| 2 | Almendres CromlechNo absolute date found by the audit or this review. The conventional Neolithic attribution in secondary literature is unsourced here (UNVERIFIED). · none | Single-grain OSL on sediment filling the sockets of monoliths confirmed to be in their original sockets, cross-checked with AMS 14C on any sealed organics. Rock-surface luminescence burial dating on buried base faces if the rock type gives a usable signal.Socket-fill and packing sediments, and buried basal faces, of stones shown in section to be undisturbed. Which stones are undisturbed must be established first, because re-erected stones would give the date of re-erection. | If older: A 6th- or early-5th-millennium BC erection would put standing-stone enclosures at or before the emergence of megalithic graves in Atlantic Iberia, placed in the second half of the 5th millennium cal BC by Schulz Paulsson (2019). That would support an early, independent Iberian standing-stone tradition. If younger: A 4th- or 3rd-millennium BC erection would show the conventional attribution is too old, as the Cruz de Cepos statue-menhir (Copper Age) and the Gavre alignment (Early Bronze Age) turned out. | Bailiff, I. et al. (2024). Dating the setting of a late prehistoric st Garcia Sanjuan, L. et al. (2023). A multimethod approach to the genesi |
| 3 | Great Sphinx of Giza4th Dynasty, c. 2500 BC (conventional). A minority weathering-based argument proposes a much greater age. Both positions are interpretive, not chronometric. · stylistic/contextual (attribution to Khafre); no absolute date of the carved bedrock | (a) Single-grain OSL on the earliest undisturbed sediment resting on the enclosure floor or against the carved body, giving a minimum age for the carving. (b) Luminescence burial dating of buried faces of masonry blocks in the adjacent temples, a technique already applied to Egyptian monuments (Liritzis & Vafiadou 2015; results not verified). (c) Cosmogenic-nuclide exposure dating of carved surfaces, only with great care: the monument was remodelled and renovated in the 18th Dynasty (Lehner 1992), and any episodes of burial or repair break the simple exposure assumptions.Enclosure-floor sediments; buried block faces in the adjacent temples; unrestored carved bedrock surfaces for exposure dating, if any can be identified. | If older: A carving age clearly before the 4th Dynasty would support the older-age argument and would require a major revision of Giza's history. Such a result would need replication and exclusion of inherited or exposure-history artefacts before being accepted. If younger: An Old Kingdom age (or a minimum age consistent with it) would confirm the Khafre attribution and settle the weathering dispute with a physical date rather than competing readings of erosion. | Lehner, M. (1992). Reconstructing the Sphinx. Cambridge Archaeological Dobecki, T.L., Schoch, R.M. (1992). Seismic investigations in the vici |
| 4 | Carnac alignmentsMegalith building in the region is modelled from the second half of the 5th millennium cal BC (Europe-wide Bayesian model of megalithic graves). The alignment rows themselves have no site-specific date in the sources checked. · associated-organic (regional) | Single-grain OSL on socket-fill sediment of in-situ menhirs, sampled in several rows. This worked at the Gavre alignment in the same wider region, where direct OSL on the quartzite blocks failed for lack of signal. Rock-surface luminescence burial dating on buried faces only if the Carnac stones' rock type gives a signal (to be tested first).Sediment filling the sockets of undisturbed menhirs, with several stones per row so that rows can be compared. | If older: A 5th-millennium date would make the rows contemporary with the earliest regional megaliths and support the conventional Neolithic reading. If younger: A 3rd- or 2nd-millennium date, like Gavre's 2040-1680 BC (1 sigma, Early Bronze Age), would show the famous rows are a later tradition than assumed. Mixed dates would show rows built or re-erected over millennia. | Cassen, S., Blain, S., Guibert, P., Querre, G. et al. (2013). Les pier Schulz Paulsson, B. (2019). Radiocarbon dates and Bayesian modeling su |
| 5 | Sacsayhuaman15th century CE (reigns of Pachacuti and Topa Inca, per chronicles). No sealed radiocarbon date for the walls was located. · historical-contextual (Spanish chronicles) | AMS 14C on short-lived organics sealed inside the foundation or construction fill of the terrace walls, together with single-grain OSL on sediment sealed beneath the lowest course of large blocks. Rock-surface luminescence burial dating on block undersides if the rock type allows.Construction fill and sub-foundation sediment at wall sections exposed in permitted excavation; lower faces of undisturbed blocks. | If older: An age centuries before the chronicles would support a pre-Inca (e.g. Killke-period) megalithic core, a major revision. An age only decades earlier would fit the pattern at Machu Picchu, where AMS dates put occupation from c. AD 1420, about two decades before the textual AD 1438 accession of Pachacuti. If younger: A 15th-century age would confirm the chronicles and refute claims that the walls are the work of an earlier, lost culture. | Burger, R.L., Salazar, L.C., Nesbitt, J., Washburn, E. et al. (2021). Bauer, B.S., Covey, R.A. (2002). Processes of state formation in the I |
| 6 | Nabta Playa stone circle and alignmentsBuilt before the area became hyperarid and uninhabitable at about 4,800 radiocarbon years BP (uncalibrated). The stones and sockets themselves are undated. · associated (nearby Middle/Late Neolithic occupation) plus a terminus ante quem | Rock-surface luminescence burial dating on the buried faces of slabs still in their original sockets, plus single-grain OSL on the socket fill. The same pairing has been used to date a prehistoric cult site (Sohbati et al. 2015).Buried lower faces of set slabs and their socket sediments. The rock type and in-situ status of each stone must be confirmed first. | If older: An age earlier than the Late Neolithic would push monumental alignment building in the eastern Sahara earlier than currently accepted. If younger: Ages after the ~4,800 BP abandonment would mean some stones were set or re-set later. That would weaken astronomical interpretations that depend on the early date. | Malville, J.M., Wendorf, F., Mazar, A.A., Schild, R. (1998). Megaliths Sohbati, R., Murray, A. et al. (2015). Age of a prehistoric 'Rodedian' |
| 7 | Osireion, Abydos19th Dynasty, c. 1290-1203 BC (construction ascribed to Seti I, decoration to Merenptah). No chronometric date of the large-block core. · historical-contextual (Seti I-stamped mud bricks and Merenptah-named reliefs in the building) | Luminescence burial dating of joint and bedding faces of the large blocks of the central hall (surfaces sealed when the blocks were laid), plus OSL on sediment sealed beneath the lowest courses. A matched sample from a securely Seti I-period wall should be dated as a known-age control.Internal joint faces of core blocks and the pillar bases; the Seti I-period control wall. | If older: An Old Kingdom or earlier age for the core would mean the stamped bricks and decoration were added to an older structure, a significant revision that popular accounts often assert without data. If younger: A 19th-Dynasty age would show the core and the stamped materials are contemporary and close the older-core reading. | Mendez-Rodriguez, D.M. (2020). Ofrendas en el Inframundo: el Libro de Liritzis, I., Vafiadou, A. (2015). Surface luminescence dating of some |
| 8 | Ha'amonga 'a MauiConventionally the reign of the 11th Tu'i Tonga, c. 13th century CE (UNVERIFIED). No chronometric date. · historical-contextual (oral king-list attribution; unsourced in the audit) | 230Th/U dating of any coral pieces built into the socket packing or fill of the uprights, as used at Nan Madol to date the first chief's tomb to AD 1180-1200. Single-grain OSL on the socket-fill sediment. U-Th on the trilithon stone itself is not useful: if it is reef limestone it would give the reef's geological age, not the construction date.Coral inclusions and sediment in the sockets at the base of the uprights. | If older: An age well before the 13th century would mean the king-list chronology, or the attribution to Tu'itatui, is too young. If younger: A 13th-century age would support the oral-historical chronology, as radiocarbon plus tradition did for the 14th-century Lapaha fort. A later age would shift monument building later in the Tongan state sequence. | McCoy, M.D., Alderson, H.A., Hemi, R., Cheng, H. et al. (2016). Earlie Clark, G., Parton, P., Reepmeyer, C., Melekiola, N. et al. (2018). Con |
| 9 | Bada Valley megaliths'Metal Age', by comparison with similar megaliths in Borneo and Laos. No chronometric date of the statues or vats. · stylistic (reclassified from 'none' in audit_review.json) | Single-grain OSL on socket-fill sediment of in-situ statues and on sediment sealed beneath stone vats, with AMS 14C on organics in sealed vat fills. Rock-surface luminescence burial dating of buried faces if the rock type allows. Vat sediment has already been cored for pollen (Kirleis et al. 2011).Socket and sub-vat sediments; basal faces of undisturbed statues; sealed vat contents. | If older: A Neolithic placement age would pre-date the Metal Age attribution and revise the Sulawesi sequence. If younger: An age in the last millennium would make this a late tradition, and would argue against linking it to the Laos jars, where OSL beneath jars and 14C on burials already differ by up to about two millennia (Shewan et al. 2021). | Kirleis, W., Pillar, V.D., Behling, H. (2011). Human-environment inter Shewan, L., O'Reilly, D., Armstrong, R., Toms, P. et al. (2021). Datin |
| 10 | Tiwanaku and PumapunkuTiwanaku IV-V framework, c. AD 500-1000. A dedicated radiocarbon chronology of the Pumapunku complex exists (Yaeger & Vranich 2013), but its results were not read. The stones themselves are undated. · associated-organic | Rock-surface luminescence burial dating of bedding faces of large platform blocks still in their original positions, plus single-grain OSL on the sediment sealed beneath them and AMS 14C on organics in construction fill sealed by the blocks. Blocks must first be shown to be in their original positions; displaced blocks would give meaningless ages.Bedding faces of in-situ blocks and the sediment beneath them. | If older: Ages well before the first millennium AD would mean the platform stones pre-date the dated occupation contexts. That would revive the question of an earlier building phase. If younger: First-millennium AD ages would tie the stonework itself to the radiocarbon chronology. They would refute popular claims of far greater antiquity with a physical date. | Yaeger, J., Vranich, A. (2013). A radiocarbon chronology of the Pumapu Liritzis, I. (2011). Surface dating by luminescence: an overview. Geoc |
Audit of a sample fixed in advance (analysis/megaliths/sample.json), drafted by two auditors and corrected by an independent review. Leads are proposals for credentialed specialists with permits.