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Evidence record

When did people reach the Americas?

Every sentence on the exploration belongs to at least one claim below. Each says what kind of statement it is, what it rests on, what the evidence does not establish, and how far it was checked. Nothing here is a score, and none of it is a verdict on a belief or a theory.

Last checked 24 September 2026.

  • Source checked: 28
  • A judgement, not a fact: 9
  • Partly checked: 15

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.

What the question takes for granted

A question in archaeology and population genetics about a date in the past. That people came from northeast Asia is well supported; when they first arrived south of the ice is argued, and the two sites that moved the date back are both disputed.

  • People reached the Americas from northeast Asia

    Established

    Supported by ancient and living genomes; the page does not question it.

  • There is one arrival date to find

    Contested

    The genetic record shows several populations and dispersals, some with no known descendants, so "when" may have more than one answer.

  • The oldest dated sites mark the earliest arrival

    Contested

    The two sites that moved the date back are both argued over, and much of the coast where early sites would be is under water.

How the question is labelled

Claim: Footprints in a dry lake

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

The footprints are in the beds of a lake that dried out at the end of the Pleistocene, now the gypsum flat of White Sands.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumaccepted manuscript, p. 2, site description

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Observational study: associations, not causes

    The source reads: created by eolian deflation of late Pleistocene lake beds following the desiccation of pluvial ... Lake Otero

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumeditor's summary

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: In a study of exposed outcrops of Lake Otero in White Sands National Park in New Mexico

Later work looked for

Crossref, 2023 on, "White Sands footprints": Holliday and others 2025 map the same lake's beds; nothing that changes this.

Claim 1 · checked 24 September 2026 · AI-assisted audit

Claim: First Americans

Kind
Framing. Signposting. It asserts nothing a source could check.

The question

Claim: The date has moved back twice in thirty years

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from the timeline on the page: the acceptance of Monte Verde in 1997 (claim 24) and the White Sands footprints in 2021 (claim 26). Each moved the accepted earliest date further back.

What this does not establish

Both moves are now disputed: the footprint dates since 2022, and Monte Verde's since 2026.

Claim 3 · checked 24 September 2026 · AI-assisted audit

Claim: and the most recent evidence is a set of footprints dated to a time when nobody should have been there

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

"Nobody should have been there" is the old framework's expectation: both routes south were closed or unlikely during the glacial maximum.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumpublished abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: multiple in situ human footprints are stratigraphically constrained and bracketed by seed layers that yield calibrated radiocarbon ages between ~23 and 21 thousand years ago

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumaccepted manuscript, p. 2, introduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: these routes would have been closed or at least unlikely during the LGM

What this does not establish

The dates themselves are argued over (claims 15 to 19).

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Corrected

24 September 2026. Previously: “and the most recent evidence is a set of footprints that should not be as old as they are” The old wording took the disputed dates as fact ("as old as they are"). The new wording says what the footprints are dated to, which is what the sources carry.

Claim 4 · checked 24 September 2026 · AI-assisted audit

Claim: The consensus that people arrived about 13,500 years ago began to collapse in the late 1980s and 1990s and has not been replaced by a firm number.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: For much of the 20th century, most archaeologists believed humans first colonized the Americas ∼13,500 years ago via an overland route that crossed Beringia and followed a long and narrow, mostly ice-free corridor

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Confidence in the Clovis-first theory started to crumble in the late 1980s and 1990s

  • Supports

    Finding the first Americansclosing section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Answers to the questions of how, when, and where humans first reached the Americas remain tentative.

What this does not establish

Braje and colleagues date the start of the collapse to the late 1980s and the 1990s, and its completion to the early 2000s.

Later work looked for

Crossref, 2017 on, "peopling of the Americas": later work (Clark 2022, Holliday 2025, Surovell 2026) moves individual dates and routes but no source found restores a firm arrival date.

Corrected

24 September 2026. Previously: “The consensus that people arrived about 13,000 years ago” The source gives the old model's date as about 13,500 years ago, and Clovis itself as about 13,400; 13,000 rounded it the wrong way.

24 September 2026. Previously: “began to collapse in the 1990s” Braje and colleagues say confidence in the old model "started to crumble in the late 1980s and 1990s"; the page had dropped the late 1980s.

Claim 5 · checked 24 September 2026 · AI-assisted audit

Claim: Footprints dated to the height of the last glaciation would put people in North America thousands of years before the route they were supposed to have used was open.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

The footprints are dated to 23,000 to 21,000 years ago; the ice-free corridor was fully open by about 13,800 and could feed travellers from about 12,600.

What this does not establish

Holds only if the footprint dates hold (claims 15 to 19).

Later work looked for

Crossref, 2016 on, "ice-free corridor opening age": Clark and others 2022 date the corridor's full opening by 64 exposure ages to 13.8 thousand years ago, later than the 15 to 14 the page had; page updated.

Claim 6 · checked 24 September 2026 · AI-assisted audit

Claim: For much of the twentieth century most archaeologists agreed on the answer: an overland migration through an ice-free corridor, about thirteen and a half thousand years ago, identified by a distinctive stone point.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: For much of the 20th century, most archaeologists believed humans first colonized the Americas ∼13,500 years ago via an overland route that crossed Beringia and followed a long and narrow, mostly ice-free corridor

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Twentieth-century discoveries of distinctive Clovis artifacts throughout North America, some associated with mammoth or mastodon kill sites, supported this “Clovis-first” model.

Corrected

24 September 2026. Previously: “For most of the twentieth century the answer was settled: a single migration through an ice-free corridor, about thirteen thousand years ago, identified by a distinctive stone point.” The source says most archaeologists believed it, not that it was settled; it describes an overland route rather than a single migration, which no cited source states; and it gives about 13,500 years.

24 September 2026. Previously: “For most of the twentieth century most archaeologists agreed on the answer: an overland migration through an ice-free corridor, about thirteen and a half thousand years ago, identified by a distinctive stone point.” Braje and colleagues say the view held for much of the 20th century, not most of it.

Claim 7 · checked 24 September 2026 · AI-assisted audit

Claim: Sites older than that were rejected, sometimes correctly.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

"Sometimes correctly" is the judgement of the sources: Braje and colleagues call one recent early claim ambiguous and at odds with most evidence.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumaccepted manuscript, p. 2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Most early sites in North America ... are questioned due to either their dating ... of humans and purported artifacts

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: The CML claim hinges on ambiguous artifacts associated with broken mastodon bones and provides minimal evidence for their geological and stratigraphic context

Claim 8 · checked 24 September 2026 · AI-assisted audit

Claim: Then several survived scrutiny, and the framework went with them.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: By the early 2000s, the Clovis-first theory collapsed after widespread scholarly acceptance that the Monte Verde locality near central Chile's Pacific Coast was occupied at least ∼14,500 years ago

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Several more pre-Clovis sites in North America's interior dated between ∼14,000 and 16,000 years ago have gained broad scholarly acceptance

What this does not establish

Monte Verde, the site most responsible, has been challenged again since 2026 (claims 43 to 45).

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Claim 9 · checked 24 September 2026 · AI-assisted audit

What was found

Claim: What was found

Kind
Framing. Signposting. It asserts nothing a source could check.

The footprints at White Sands

Claim: The footprints at White Sands

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: In 2021 a study reported human footprints preserved in lake-margin sediments in New Mexico, dated by seeds in the layers above and below them to between about 23,000 and 21,000 years ago.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumpublished abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: multiple in situ human footprints are stratigraphically constrained and bracketed by seed layers that yield calibrated radiocarbon ages between ~23 and 21 thousand years ago

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumeditor's summary

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: In a study of exposed outcrops of Lake Otero in White Sands National Park in New Mexico

What this does not establish

The ages are radiocarbon dates on the seeds of an aquatic plant, which is what the dispute in claims 15 to 19 is about.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Claim 12 · checked 24 September 2026 · AI-assisted audit

Claim: That is during the last glacial maximum, when the ice sheets were at their largest and the corridor through them was closed.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Claim 13 · checked 24 September 2026 · AI-assisted audit

Claim: If the dates hold, people were south of the ice while the standard route was shut, and had come before the ice closed it.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

An inference by the teams that dated the footprints, conditional on their dates.

Corrected

24 September 2026. Previously: “If the dates hold, people were south of the ice before the standard route existed.” The corridor existed before the glacial maximum closed it. Bennett and Holliday both read the footprints as people who arrived before the ice closed the routes, not before a route existed.

Claim 14 · checked 24 September 2026 · AI-assisted audit

Claim: The dating was challenged on the grounds that the seeds were aquatic plants, which can take up old carbon from the water.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

The comment by Madsen and colleagues was read as its abstract only.

Claim 15 · checked 24 September 2026 · AI-assisted audit

Claim: The team returned with pollen from terrestrial plants and with a separate method dating the quartz grains themselves, and reported that both bear the original dates out.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

The Science paper was read as its abstract; its methods and luminescence results were read in the team's USGS data release.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Corrected

24 September 2026. Previously: “and got the same answer.” The luminescence dates are minimum ages rather than the same answer, so the sentence now says what the team reported and the next sentence says what the quartz gives.

Claim 16 · checked 24 September 2026 · AI-assisted audit

Claim: The quartz dates are minimum ages, and put the layer at about 21,000 years or more.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

The minimum is 21.4 thousand years with an uncertainty of 1.9 thousand. The team excluded the luminescence ages from its age model because they are minima.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Corrected

24 September 2026. Previously: “” Added: the page said the quartz gave "the same answer", and the team's own methods say its ages likely underestimate the true age.

Claim 17 · checked 24 September 2026 · AI-assisted audit

Claim: The argument has not stopped.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Claim 18 · checked 24 September 2026 · AI-assisted audit

Claim: A 2024 study of the same plant growing today argued the footprints could be at least 7,500 years younger, and a 2025 study of the ancient lake’s muds, led by one of the original authors, supported the glacial age.

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

The 2024 study was read as its abstract. The 2025 study dates muds with two laboratories independent of the original work, but its lead author is not independent of it.

Other readings

Rachal, Dello-Russo and Cuba argue from modern plants that the seed dates are too old; Holliday and colleagues answer that modern spring-fed plants do not show how the Pleistocene lake behaved, and that dates on seeds, pollen and muds agree.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Corrected

24 September 2026. Previously: “” Added: the page presented the 2023 answer as the end of the matter, and both sides have published since.

Claim 19 · checked 24 September 2026 · AI-assisted audit

Claim: How the date has moved

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: for much of the 1900s

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: For much of the 20th century, most archaeologists believed humans first colonized the Americas ∼13,500 years ago via an overland route that crossed Beringia and followed a long and narrow, mostly ice-free corridor

Corrected

24 September 2026. Previously: “for most of the 1900s” Braje and colleagues say the view held for much of the 20th century, not most of it.

Claim 21 · checked 24 September 2026 · AI-assisted audit

Claim: About 13,500 years ago, by an ice-free corridor, identified with a single tool tradition.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: For much of the 20th century, most archaeologists believed humans first colonized the Americas ∼13,500 years ago via an overland route that crossed Beringia and followed a long and narrow, mostly ice-free corridor

  • Supports

    Finding the first Americansfirst paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Twentieth-century discoveries of distinctive Clovis artifacts throughout North America, some associated with mammoth or mastodon kill sites, supported this “Clovis-first” model.

Corrected

24 September 2026. Previously: “About 13,000 years ago, by an ice-free corridor, identified with a single tool tradition.” The source gives about 13,500 years.

Claim 22 · checked 24 September 2026 · AI-assisted audit

Claim: 1997

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    On the Pleistocene Antiquity of Monte Verde, Southern Chileabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Review of the field

    The source reads: a site visit in January 1997 by a group of Paleoindian specialists. It is the consensus of that group that the MV-II occupation at the site is both archaeological and 12,500 years old

What this does not establish

The panel's report was read as its abstract.

Claim 23 · checked 24 September 2026 · AI-assisted audit

Claim: A panel of specialists visits Monte Verde in southern Chile and accepts its upper layer at 12,500 radiocarbon years, about 14,500 in calendar years, older than the corridor and a very long way south.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    On the Pleistocene Antiquity of Monte Verde, Southern Chileabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Review of the field

    The source reads: a site visit in January 1997 by a group of Paleoindian specialists. It is the consensus of that group that the MV-II occupation at the site is both archaeological and 12,500 years old

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, ChileIntroduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: Previous work at Monte Verde revealed one valid human site (MV-II) dated ~14,500 cal BP

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: a millennium or more older than Clovis and the opening of a viable ice-free corridor no earlier than ∼13,500 years ago

What this does not establish

The panel's report was read as its abstract, which says "12,500 years old"; that these are radiocarbon years is how the site's later literature, which gives about 14,500 calibrated years, reads it. The age itself has been challenged since 2026 (claims 43 to 45).

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Claim 24 · checked 24 September 2026 · AI-assisted audit

Claim: 2021

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

Read in the abstract of the comment on the paper.

Claim 25 · checked 24 September 2026 · AI-assisted audit

Claim: Footprints in New Mexico dated to 23,000 to 21,000 years ago, during the glacial maximum.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumpublished abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: multiple in situ human footprints are stratigraphically constrained and bracketed by seed layers that yield calibrated radiocarbon ages between ~23 and 21 thousand years ago

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumpublished abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: These findings confirm the presence of humans in North America during the Last Glacial Maximum

What this does not establish

The dates are disputed (claims 15 to 19).

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Claim 26 · checked 24 September 2026 · AI-assisted audit

Claim: since

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The dating challenged, defended with two independent methods, and argued about.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

The challenge and the defence were read as abstracts.

Later work looked for

Crossref, 2022 on, "White Sands footprints", "Lake Otero footprints", "Ruppia radiocarbon": Oviatt and others 2022 and Rachal and others 2024 and 2025 argue the seed dates are too old; Pigati and others 2023 and Holliday and others 2025 support them; a 2025 PaleoAmerica comment continues the exchange. Page updated to report both sides.

Claim 28 · checked 24 September 2026 · AI-assisted audit

Claim: In 2026 Monte Verde’s own date was challenged too.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    A mid-Holocene age for Monte Verde challenges the timeline of human colonization of South Americaabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Earth and its record · Observational study: associations, not causes

    The source reads: radiocarbon and luminescence dates from alluvial exposures, in combination with the identification of a tephra dated to 11,000 years B.P. stratigraphically underlying the archaeological component, suggest that Monte Verde cannot be older than the Middle Holocene (8200 to 4200 years B.P.).

What this does not establish

Read as the abstract.

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Corrected

24 September 2026. Previously: “” Added: the timeline ended as though Monte Verde were settled, and a 2026 study argues it is middle Holocene.

Claim 29 · checked 24 September 2026 · AI-assisted audit

Claim: The framework both displaced has not been replaced.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claims 5 and 9: the old model fell and no single date or route has taken its place.

  • Context

    Finding the first Americansclosing section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Answers to the questions of how, when, and where humans first reached the Americas remain tentative.

Corrected

24 September 2026. Previously: “The framework it displaced has not been replaced.” The entry now names two challenges, so the pronoun follows.

Claim 30 · checked 24 September 2026 · AI-assisted audit

The genetics agree on a source and not on a date

Claim: The genetics agree on a source and not on a date

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A summary of claims 32 to 35: the genomes point to northeast Asia, while their dates sit awkwardly with the footprints.

Claim 31 · checked 24 September 2026 · AI-assisted audit

Claim: Genomes of living and ancient Native Americans point to a founding population related to northeast Asians, isolated for some thousands of years before expanding south.

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    Peopling of the Americas as inferred from ancient genomicsabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Research in people · Review of the field

    The source reads: the initial dispersal involved the movement from northeast Asia of distinct and previously unknown populations, including some for whom there are no currently known descendants

  • Supports

    Peopling of the Americas as inferred from ancient genomicsabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Research in people · Review of the field

    The source reads: The first peoples, once south of the continental ice sheets, spread widely, expanded rapidly and branched into multiple populations.

  • Supports

    Terminal Pleistocene Alaskan genome reveals first founding population of Native Americansabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Model

    The source reads: descended from a single founding population that initially split from East Asians around 36 ± 1.5 ka, with gene flow persisting until around 25 ± 1.1 ka

  • Supports

    Terminal Pleistocene Alaskan genome reveals first founding population of Native Americansabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Model

    The source reads: Our findings support a long-term genetic structure in ancestral Native Americans, consistent with the Beringian 'standstill model'.

What this does not establish

The review by Willerslev and Meltzer was read as its abstract. The length of the isolation is a model estimate, and the model behind it is the "standstill" reading of the data.

Later work looked for

Europe PMC, 2022 to 2026, "Native American" and "ancient genomes": Rider and others 2024 (Science Advances) report a Blackfoot lineage diverging in the Late Pleistocene and Castro e Silva and others 2026 (Nature) at least three dispersals into South America, both from abstracts; neither revises the northern and southern split the page reports.

Claim 32 · checked 24 September 2026 · AI-assisted audit

Claim: Modelling of ancient genomes puts the split between the northern and southern branches of Native Americans at 17,500 to 14,600 years ago, and probably south of the ice sheets.

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

One genome from Upward Sun River, Alaska, set in a demographic model. The date is when two lineages separated, not when people first arrived.

Later work looked for

Europe PMC, 2022 to 2026, "Native American" and "ancient genomes": Rider and others 2024 (Science Advances) report a Blackfoot lineage diverging in the Late Pleistocene and Castro e Silva and others 2026 (Nature) at least three dispersals into South America, both from abstracts; neither revises the northern and southern split the page reports.

Corrected

24 September 2026. Previously: “and places it south of the ice sheets.” The paper says "probably"; the page had dropped the hedge.

Claim 33 · checked 24 September 2026 · AI-assisted audit

Claim: That sits awkwardly with footprints several thousand years older.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claims 26 and 33: the footprints are dated to 23,000 to 21,000 years ago, and the model places the population's spread south of the ice after about 17,500.

Claim 34 · checked 24 September 2026 · AI-assisted audit

Claim: If the footprints are as old as their dates, either their makers left no genetic descendants, or the genetic dating is missing something.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Willerslev and Meltzer note that some early populations in the Americas have no currently known descendants.

  • Context

    Peopling of the Americas as inferred from ancient genomicsabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Research in people · Review of the field

    The source reads: the initial dispersal involved the movement from northeast Asia of distinct and previously unknown populations, including some for whom there are no currently known descendants

Other readings

A third possibility, argued by the critics in claim 19, is that the footprints are younger than their dates.

Corrected

24 September 2026. Previously: “Either the footprint-makers left no genetic descendants, or the genetic dating is missing something.” Offered two explanations as the only ones while the footprint dates are themselves disputed.

Claim 35 · checked 24 September 2026 · AI-assisted audit

The site that broke the old consensus

Claim: The site that broke the old consensus

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: By the early 2000s, the Clovis-first theory collapsed after widespread scholarly acceptance that the Monte Verde locality near central Chile's Pacific Coast was occupied at least ∼14,500 years ago

Claim 36 · checked 24 September 2026 · AI-assisted audit

Claim: Monte Verde, in southern Chile, was excavated from the 1970s and reported dates around 14,500 years ago, a thousand years before the accepted arrival and far to the south, in northern Patagonia.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, ChileDiscussion

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: when we first excavated the MV-II site in the late 1970s

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, ChileIntroduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: Previous work at Monte Verde revealed one valid human site (MV-II) dated ~14,500 cal BP

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, Chileabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: provide insight into an earlier context of late Pleistocene human behavior in northern Patagonia

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: a millennium or more older than Clovis and the opening of a viable ice-free corridor no earlier than ∼13,500 years ago

Corrected

24 September 2026. Previously: “a thousand years before the accepted arrival and fourteen thousand kilometres from the Bering Strait.” No cited source gives the distance; the site's excavators place it in northern Patagonia.

Claim 37 · checked 24 September 2026 · AI-assisted audit

Claim: In 1997 a panel of specialists visited the site and accepted its upper layer.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    On the Pleistocene Antiquity of Monte Verde, Southern Chileabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Review of the field

    The source reads: a site visit in January 1997 by a group of Paleoindian specialists. It is the consensus of that group that the MV-II occupation at the site is both archaeological and 12,500 years old

What this does not establish

The panel's report was read as its abstract.

Claim 38 · checked 24 September 2026 · AI-assisted audit

Claim: Later work dated nine species of seaweed from that layer, carried from beaches and estuaries and used for food and medicine,

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    Monte Verde: Seaweed, Food, Medicine, and the Peopling of South Americaabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: Remains of nine species of marine algae were recovered from hearths and other features at Monte Verde II, an upper occupational layer, and were directly dated between 14,220 and 13,980 calendar years before the present

  • Supports

    Monte Verde: Seaweed, Food, Medicine, and the Peopling of South Americaabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: the site's inhabitants used seaweed from distant beaches and estuarine environments for food and medicine

What this does not establish

Read as the abstract. The age of the layer is now disputed (claims 43 to 45).

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Corrected

24 September 2026. Previously: “Later work there dated nine species of seaweed, carried from beaches and estuaries and used for food and medicine,” The seaweed comes from the same upper layer the panel accepted; the old wording left it unplaced.

Claim 39 · checked 24 September 2026 · AI-assisted audit

Claim: and reported scattered stone tools, bone and burnt patches in older layers, between about 18,500 and 14,500 years ago, which the excavators call probable rather than certain.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, Chileabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: New evidence of stone artifacts, faunal remains, and burned areas suggests discrete horizons of ephemeral human activity in a sandur plain setting radiocarbon and luminescence dated between at least ~18,500 and 14,500 cal BP.

  • Supports

    New Archaeological Evidence for an Early Human Presence at Monte Verde, Chileabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: we present the probable anthropogenic origins and wider implications of this evidence

What this does not establish

A preliminary reconnaissance with few artefacts, as its authors say.

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Corrected

24 September 2026. Previously: “and reported scattered stone tools, bone and burnt patches in older ground still, which the excavators call probable rather than certain.” Gives the dates the excavators report, and drops "still", which read as though the seaweed were older than the accepted layer.

Claim 40 · checked 24 September 2026 · AI-assisted audit

Claim: That acceptance, widespread by the early 2000s, is what ended the old framework.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americanssecond paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: By the early 2000s, the Clovis-first theory collapsed after widespread scholarly acceptance that the Monte Verde locality near central Chile's Pacific Coast was occupied at least ∼14,500 years ago

What this does not establish

Braje and colleagues also credit evidence of early seafaring in Asia with starting the collapse.

Corrected

24 September 2026. Previously: “That acceptance is what ended the single-migration framework.” The source dates the collapse to the early 2000s, after widespread acceptance, and names the old model Clovis-first; no cited source calls it a single migration.

Claim 41 · checked 24 September 2026 · AI-assisted audit

Claim: The footprints in New Mexico arrived into a field that had already learned to take an early date seriously.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claims 36 to 41: Monte Verde was accepted two decades before the footprints were reported.

Claim 42 · checked 24 September 2026 · AI-assisted audit

Claim: In 2026 the site was put in question again.

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

Both papers were read as abstracts.

Other readings

Surovell and colleagues argue for a middle Holocene age; Waters and colleagues defend about 14,400 years.

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Corrected

24 September 2026. Previously: “” Added: the page presented Monte Verde as settled, and a 2026 study in Science challenges its age, with a published reply.

Claim 43 · checked 24 September 2026 · AI-assisted audit

Claim: The first independent investigation of it in nearly fifty years argued, from dates on the surrounding stream deposits and a volcanic ash of 11,000 years ago lying beneath the archaeological layer, that it cannot be older than the middle Holocene, 8,200 to 4,200 years ago.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

Read as the abstract. The study dates the deposits around the site; it is contested (claim 45).

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Claim 44 · checked 24 September 2026 · AI-assisted audit

Claim: Another team replied that the argument is flawed and that decades of work support about 14,400 years.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

Read as the abstract, reassembled from OpenAlex.

Later work looked for

Crossref, 2016 on, "Monte Verde": Surovell and others (Science, 2026) argue the site cannot be older than the middle Holocene; Waters and others (PaleoAmerica, 2026) reply that about 14,400 years holds, and Tune and Miller (PaleoAmerica, 2026) discuss the debate. Page updated to report the dispute.

Claim 45 · checked 24 September 2026 · AI-assisted audit

What is not settled

Claim: What is not settled

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The route that would settle this is on the sea floor.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Refers to the coastal route, whose shorelines were drowned as the sea rose (claims 51 to 55).

  • Context

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Testing the kelp highway hypothesis is challenging because much of the archaeological evidence would have been submerged by rising seas since the last glacial maximum (LGM) ∼26,500 years ago.

Claim 47 · checked 24 September 2026 · AI-assisted audit

Which route

Claim: Which route

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The corridor through the ice began to open about 15,000 years ago and was fully open by about 13,800,

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

Exposure ages on boulders. Earlier radiocarbon estimates put the opening at 15,000 to 14,000.

Later work looked for

Crossref, 2016 on, "ice-free corridor opening age": Clark and others 2022 date the corridor's full opening by 64 exposure ages to 13.8 thousand years ago, later than the 15 to 14 the page had; page updated.

Corrected

24 September 2026. Previously: “The corridor through the ice opened about 15,000 to 14,000 years ago,” Clark and others 2022 date the full opening with 64 exposure ages to 13.8 thousand years, later than the range the page gave.

Claim 49 · checked 24 September 2026 · AI-assisted audit

Claim: but the plants and animals that would have fed anyone walking it arrive in the sediment record only around 12,600.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    Postglacial viability and colonization in North America’s ice-free corridorabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Earth and its record · Observational study: associations, not causes

    The source reads: We find evidence of steppe vegetation, bison and mammoth by approximately 12.6 cal. kyr bp

  • Supports

    Postglacial viability and colonization in North America’s ice-free corridorabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Earth and its record · Observational study: associations, not causes

    The source reads: the first Americans, whether Clovis or earlier groups in unglaciated North America before 12.6 cal. kyr bp, are unlikely to have travelled by this route into the Americas

What this does not establish

Read as the abstract. One lake-core site in a bottleneck of the corridor.

Later work looked for

Crossref, 2016 on, "ice-free corridor opening age": Clark and others 2022 date the corridor's full opening by 64 exposure ages to 13.8 thousand years ago, later than the 15 to 14 the page had; page updated.

Claim 50 · checked 24 September 2026 · AI-assisted audit

Claim: The coastal alternative, moving south along the Pacific edge, is favoured by many archaeologists and hard to test:

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: In a dramatic intellectual turnabout, most archaeologists and other scholars now believe that the earliest Americans followed Pacific Rim shorelines

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Testing the kelp highway hypothesis is challenging because much of the archaeological evidence would have been submerged by rising seas since the last glacial maximum (LGM) ∼26,500 years ago.

What this does not establish

Braje and colleagues, advocates of the coastal route, say most archaeologists now hold it; the page says many.

Corrected

24 September 2026. Previously: “The coastal alternative, moving south along the Pacific edge, is plausible and hard to test:” The cited source reports it as the view most archaeologists now hold, which "plausible" understated.

Claim 51 · checked 24 September 2026 · AI-assisted audit

Claim: global sea level at the glacial maximum was 134 metres below today’s,

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Sea level and global ice volumes from the Last Glacial Maximum to the HoloceneDiscussion, (ii); abstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Model

    The source reads: The esl reaches its lowest value of ∼134 m at the end of this interval ... at the LGM than today. This is greater than the frequently cited −125 m (e.g., 24, 80) that is usually based on observations uncorrected for isostatic effects.

    The esl is ice-volume equivalent sea level, the global figure; "this interval" is 29 to 21 thousand years ago, the glacial maximum.

What this does not establish

A global figure inverted from about a thousand observations; the local fall on any coast differs. The often-quoted 125 metres is lower because, the authors say, it is usually not corrected for the crust’s response to the ice.

Later work looked for

Crossref, 2014 on, "global sea level Last Glacial Maximum": nothing found that replaces the figure.

Corrected

24 September 2026. Previously: “sea level at the glacial maximum was 134 metres below today,” The figure is a global one; local sea level differed by coast.

Claim 52 · checked 24 September 2026 · AI-assisted audit

Claim: and those shorelines now lie tens to hundreds of kilometres offshore.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansclosing section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: shorelines that have migrated tens or even hundreds of kilometers from their locations at the LGM

Later work looked for

A general statement about drowned coastlines; no later work found that revises it.

Claim 53 · checked 24 September 2026 · AI-assisted audit

Claim: Much of the evidence that would settle this is under water,

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: Testing the kelp highway hypothesis is challenging because much of the archaeological evidence would have been submerged by rising seas since the last glacial maximum (LGM) ∼26,500 years ago.

Corrected

24 September 2026. Previously: “Most of the evidence that would settle this is under water, and the mapping of those drowned landscapes is only starting.” The source says "much", not "most", and describes mapping already under way in 2017 rather than only starting; the sentence now quotes it.

Claim 54 · checked 24 September 2026 · AI-assisted audit

Claim: on drowned landscapes that five archaeologists writing in 2017 called “one of the last frontiers for archaeology in the Americas”.

Kind
Quotes a source. The words of a named text, checked against the source.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Finding the first Americansclosing section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: the submerged landscapes that are one of the last frontiers for archaeology in the Americas

Claim 55 · checked 24 September 2026 · AI-assisted audit

Why old sites are hard to accept

Claim: Why old sites are hard to accept

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: The field spent decades rejecting claims of early sites,

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumaccepted manuscript, p. 2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Most early sites in North America ... are questioned due to either their dating ... of humans and purported artifacts

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: some scholars and members of the general public quick to accept implausible claims based on limited and equivocal evidence

Claim 57 · checked 24 September 2026 · AI-assisted audit

Claim: and many of those rejections were sound: doubtful dates, objects that may not have been made by people, layers whose context was never clear.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

The three kinds of doubt are the ones the sources name: dating, whether objects were made by people, and geological context.

  • Supports

    Evidence of humans in North America during the Last Glacial Maximumaccepted manuscript, p. 2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Most early sites in North America ... are questioned due to either their dating ... of humans and purported artifacts

  • Supports

    Finding the first Americansthird section

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Review of the field

    The source reads: The CML claim hinges on ambiguous artifacts associated with broken mastodon bones and provides minimal evidence for their geological and stratigraphic context

Corrected

24 September 2026. Previously: “and many of those rejections were right: disturbed layers, natural rock fractures mistaken for tools, contaminated dates.” The cited sources name dating, the association of people with purported artefacts, and stratigraphic context; none names rock fractures or contamination specifically.

Claim 58 · checked 24 September 2026 · AI-assisted audit

Claim: That history makes the bar for a new claim high, which is appropriate, and it also means a real result has to survive an unusually hostile review.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page's own judgement. Dillehay and colleagues describe the criteria for evaluating early sites as themselves under debate.

  • Context

    New Archaeological Evidence for an Early Human Presence at Monte Verde, Chileabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Interdisciplinary debate continues over the timing of entry, the rapidity and direction of dispersion, the variety of human responses to diverse habitats, the criteria for evaluating the validity of early sites

Claim 59 · checked 24 September 2026 · AI-assisted audit

Claim: The footprints are currently in the middle of that process, and since 2026 so is Monte Verde.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claims 19 and 43 to 45: both sides of each dispute have published since 2024.

Corrected

24 September 2026. Previously: “The footprints are currently in the middle of that process.” Monte Verde's age has been challenged since 2026.

Claim 60 · checked 24 September 2026 · AI-assisted audit

What was read