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Evidence record

When did we start wearing clothes?

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: 33
  • A judgement, not a fact: 11

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.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 dating question about a behaviour that leaves almost nothing behind. The page answers it through a proxy, the origin of the clothing louse, and the uncertainty is in the model, in what the proxy dates, and in how thin the archaeology is.

  • Clothing lice depend on clothing

    Established

    Clothing lice live and lay eggs in clothing; this is what lets their origin bound the habit.

  • The origin of the clothing louse tracks the start of regular clothing use

    Contested

    The 2003 authors grant that clothing may be much older than the louse, and a 2020 review argues clothing lice arise from head lice repeatedly rather than once. The page reports both.

  • Clothing began once, at a time that can be dated

    Contested

    The page treats the lice as dating regular wear, not a single invention, and keeps hide-working and sewing as separate stages. A 2009 commentary argues clothing was not a single invention.

How the question is labelled

Claim: Dated by a parasite

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

Claim: Clothing

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

The question

Claim: Early clothes do not survive.

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

Some perishable fibres do survive, as the opening says; what does not survive is the early clothing itself.

Corrected

24 September 2026. Previously: “Clothes do not survive.” Too broad: later clothing and some early fibres survive. The sources say early clothing and hides degrade.

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

Claim: The lice that live in them do, in the sense that their genomes record when they became a separate kind of louse.

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 image for the method the 2010 study describes. Whether the split was one event is disputed; see claim 48.

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

Claim: Human head lice and clothing lice are two forms of one species, and clothing lice live only in clothing.

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
Source checked. The cited passage was read, and it says this.

Later work looked for

Europe PMC, 2011 on, "head lice body lice ecotypes": the 2020 review is the most recent synthesis found and states the one-species view.

Corrected

24 September 2026. Previously: “Human head lice and clothing lice are distinct populations, and clothing lice can only live where there is clothing.” “Distinct populations” overstated the separation: the review and the 2010 study both describe one species with two ecological types, and whether they separated once is disputed.

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

Claim: Dating their divergence gives a date by which the habit existed

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.

Other readings

A 2020 review holds that clothing lice arise from head lice repeatedly rather than once (claim 48), which makes a single divergence date harder to read.

Later work looked for

How the method works; not a finding later work revises.

Corrected

24 September 2026. Previously: “Dating their divergence dates the habit” The 2010 study frames the divergence as a date by which clothing was in regular use, not as the date of its start.

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

Claim: and the 2010 estimate is of the order of a hundred thousand years, before the migration out of Africa.

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.

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaabstract

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

    The source reads: we use a Bayesian coalescent modeling approach to estimate that clothing lice diverged from head louse ancestors at least by 83,000 and possibly as early as 170,000 years ago. Our analysis suggests that the use of clothing likely originated with anatomically modern humans in Africa

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaclosing paragraph

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

    The source reads: Our estimate for the origin of clothing use suggests that one of the technologies necessary for successful dispersal into colder climates was already available to AMH prior to their emergence out of Africa.

What this does not establish

A model estimate from louse DNA, with a 95 per cent interval of 29,000 to 691,000 years. The study does not date the migration out of Africa; “before” is its own conclusion.

Later work looked for

Crossref and Europe PMC, 2011 on, "clothing lice" or "body lice" with "origin" or "divergence": no later study re-dates the split; a 2020 review (Amanzougaghene and others) still reports the 2010 date and adds the rival view that clothing lice arise repeatedly, now on the page.

Corrected

24 September 2026. Previously: “and gives an age of the order of a hundred thousand years, well before the migration out of Africa.” Named the one study that carries the figure and dropped “well”, which the study’s own interval does not support.

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

Claim: Fabric rots.

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.

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

Claim: Wild flax fibres from a cave in Georgia, spun, dyed and knotted, come from layers going back to between about 36,000 and 31,000 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

    30,000-year-old wild flax fibersabstract

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

    The source reads: 30,000-year-old wild flax fibers ... A unique finding of wild flax fibers from a series of Upper Paleolithic layers at Dzudzuana Cave, located in the foothills of the Caucasus, Georgia

  • Supports

    30,000-year-old wild flax fibersabstract

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

    The source reads: Radiocarbon dates demonstrate that the cave was inhabited intermittently during several periods dated to 32 to 26 thousand years before the present (kyr B.P.), 23 to 19 kyr B.P., and 13 to 11 kyr B.P. Spun, dyed, and knotted flax fibers are common.

    These are radiocarbon years, not calendar years; the paper gives the calibrated ages beside them.

  • Supports

    30,000-year-old wild flax fibersauthor manuscript (Harvard DASH), second paragraph

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

    The source reads: Radiocarbon dates demonstrate that Dzudzuana cave was inhabited in the Upper Palaeolithic period, during 32-26 ka 14C BP (36-31 ka cal. BP; Unit D), 23-19 ka 14C BP (28-24 ka cal. BP; Unit C)

    The page gives the calibrated range for the oldest unit, 36,000 to 31,000 calendar years before present.

  • Supports

    30,000-year-old wild flax fibersauthor manuscript (Harvard DASH), on Units D and C

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

    The source reads: All 27 clay samples from Unit D produced fibers of flax (N=488) (Table S2); some were spun (N=13) and dyed (N=58) ... A few fibers were spun (N=18), and one string had numerous knots in Unit C-3.

What this does not establish

Fibres, not cloth: the authors list cords, baskets and sewn garments as possible uses. Spun and dyed fibres occur in the oldest unit; the knotted string is from the next one up, 28,000 to 24,000 calendar years ago.

Later work looked for

Crossref and Europe PMC, 2010 on, "Neanderthal fibre" and "Dzudzuana flax": Hardy and others (2020) report an older cord; page updated.

Corrected

24 September 2026. Previously: “The oldest fibres anyone has recovered are wild flax from a cave in Georgia, spun and dyed and knotted, from layers dated 32,000 to 26,000 years ago.” No longer the oldest: a three-ply cord from Abri du Maras, France, reported in 2020, is older (claim 10).

24 September 2026. Previously: “Wild flax fibres from a cave in Georgia, spun, dyed and knotted, come from layers going back to between 32,000 and 26,000 years ago.” 32,000 to 26,000 is the oldest unit's age in radiocarbon years; the paper calibrates it to 36,000 to 31,000 calendar years, and the page says years ago.

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

Claim: A scrap of three-ply cord on a Neanderthal stone tool in France is older, from a level dated to between about 41,000 and 52,000 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.

What this does not establish

One fragment, about 6 millimetres long. It is cord, not cloth, and the authors list clothing among many uses of twisted fibre.

Later work looked for

Europe PMC, 2020 on, "Abri du Maras" and "fibre technology": nothing older reported as direct evidence; a 2024 dating study of the site does not change level 4.2.

Corrected

24 September 2026. Previously: “” Added so the page no longer calls the Georgian flax the oldest fibres recovered.

Claim 10 · checked 24 September 2026 · AI-assisted audit

Claim: So the question looked unanswerable, until someone noticed that a parasite had been keeping records.

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 2003 study describes frequent clothing use as an event with no direct archaeological evidence and dates it through lice.

  • Context

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: This ecological differentiation probably arose when humans adopted frequent use of clothing, an important event in human evolution for which there is no direct archaeological evidence.

Claim 11 · checked 24 September 2026 · AI-assisted audit

How it was dated

Claim: How it was dated

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

The method

Claim: The method

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

Claim: Human head lice live in hair.

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
Source checked. The cited passage was read, and it says this.

Later work looked for

Europe PMC, 2011 on: basic louse biology; nothing that changes it.

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

Claim: Clothing lice live and lay eggs in clothing, feeding on the body.

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
Source checked. The cited passage was read, and it says this.

Later work looked for

Europe PMC, 2011 on: basic louse biology; nothing that changes it.

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

Claim: They are two forms of one species, and the second cannot exist without the habit.

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
Source checked. The cited passage was read, and it says this.

“The second” is the clothing louse, and “the habit” is wearing clothes.

Later work looked for

Europe PMC, 2011 on, "head lice body lice ecotypes": the 2020 review is the latest synthesis found.

Corrected

24 September 2026. Previously: “They are closely related and they are distinct populations, and the second cannot exist without the first habit.” The review describes ecotypes of one species; “distinct populations” overstated it.

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

Claim: So the moment clothing lice diverged from head lice is a lower bound on when people began wearing clothes regularly enough to support a parasite specialised for 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.

A lower bound on the habit’s age: clothing is at least as old as the split.

Other readings

A 2020 review argues the split is not one moment, because clothing lice keep arising from head lice (claim 48).

Later work looked for

How the method works; not a finding later work revises.

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

Claim: Dating a habit with no artefacts

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

Claim: Find a parasite that depends on the behaviour

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

Claim: Clothing lice live only in clothing.

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
Source checked. The cited passage was read, and it says this.

  • Supports

    Where Are We With Human Lice? A Review of the Current State of KnowledgeHuman lice as markers of human evolution

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

    The source reads: which would have evolved only after humans had worn these clothes since this louse lives exclusively in clothing (Kittler et al., 2003)

  • Supports

    Apes, lice and prehistoryLice and clothing

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

    The source reads: Head lice feed on the scalp and breed in hair, whereas body lice feed on the skin but breed in clothing.

Later work looked for

Europe PMC, 2011 on: basic louse biology; nothing that changes it.

Corrected

24 September 2026. Previously: “Clothing lice cannot complete their life cycle without clothing.” Narrowed to what the sources state: they live and breed in clothing. No source read states the life-cycle claim as such.

Claim 20 · checked 24 September 2026 · AI-assisted audit

Claim: Their existence is evidence that the habit existed.

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

How the method works; not a finding later work revises.

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

Claim: Date the divergence

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

Claim: Sequence both forms, count the differences, and calibrate against a mutation rate.

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.

A simplification: the 2010 study used a Bayesian coalescent model rather than a count of differences.

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion

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

    The source reads: the divergence time of 5.5 million years between humans and chimpanzees [5] also corresponds to the P. humanus-P. schaeffi divergence, and hence was used as a calibration point for molecular clocks

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africamethods

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

    The source reads: Rates were calibrated by placing an exponential prior distribution (lower bound = 5 Ma, mean = 5.5 Ma) on the divergence of P. humanus (human) and P. schaeffi (chimpanzee) lice that reflects conservatively recent estimates for the divergence of their hosts

Later work looked for

How the method works; not a finding later work revises.

Corrected

24 September 2026. Previously: “Sequence both populations” Matches the one-species description elsewhere on the page.

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

Claim: The answer is the age of the louse, and so a date by which the niche existed.

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

How the method works; not a finding later work revises.

Corrected

24 September 2026. Previously: “The answer is the age of the niche.” The method dates the louse, which bounds the niche; it does not date the niche itself, as the next step says.

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

Claim: Treat it as a bound

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

Claim: The date is when clothing became regular enough to support a specialist.

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

How the method works; not a finding later work revises.

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

Claim: Occasional use of a hide in the cold leaves no such trace and could be far older.

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

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion, final paragraph

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

    The source reads: it is possible that clothing existed for some time before lice exploited this new ecological niche, in which case the origin of clothing could be much more ancient than the origin of body lice

Later work looked for

How the method works; not a finding later work revises.

Claim 27 · checked 24 September 2026 · AI-assisted audit

Where the idea came from

Claim: Where the idea came from

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

Claim: The approach goes back to a 2003 study of louse sequences, which dated the origin of the clothing louse to roughly 70,000 years ago.

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

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: We therefore used a molecular clock approach to date the origin of body lice, assuming that this should correspond with the frequent use of clothing.

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: A molecular clock analysis indicates that body lice originated not more than about 72,000 ± 42,000 years ago

  • Supports

    Apes, lice and prehistoryLice and clothing

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

    The source reads: Kittler et al. [4] initially reckoned that body lice diverged from head lice approximately 70,000 years ago, but they later increased this estimate to 107,000 years ago by correcting an error concerning the original outlier sequence.

What this does not establish

The 2003 figure is an upper bound on the clothing louse’s age, and its authors later corrected it (claim 33).

Corrected

24 September 2026. Previously: “The approach was introduced in 2003, when a study of lice sequences proposed that the clothing louse arose from the head louse and dated the split at roughly 70,000 years ago.” The 2003 study took the head-louse origin as expected rather than proposing it, and no source read settles who first had the idea; the claim of introduction is narrowed.

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

Claim: Its authors read that estimate as tying clothing to the spread of modern humans out of Africa and into cooler regions, which the archaeology then available did not contradict.

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

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion

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

    The source reads: clothing was a surprisingly recent innovation, associated with the spread of early modern humans out of Africa and into cooler regions

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion, final paragraph

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

    The source reads: archaeological evidence does not contradict an association of clothing specifically with modern humans, as the only tools that can be definitely associated with clothing, such as needles, are only about 40,000 years old

Corrected

24 September 2026. Previously: “That first estimate was read as support for clothing being invented as people moved into colder regions, which fitted the archaeology then available.” Attributed the reading to the authors who made it, and used their own, weaker, word about the archaeology.

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

Claim: That first study already found more diversity in African than in non-African lice.

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

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: The results indicate greater diversity in African than non-African lice, suggesting an African origin of human lice.

What this does not establish

The African lice in that study came from a single location, Ethiopia.

Later work looked for

Crossref, 2011 on, "head lice diversity Africa": later work on louse clades (reviewed in 2020) keeps Africa as the most diverse region; nothing that reverses it.

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

Claim: What changed was the 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.

Follows from claims 31 and 33: the African origin was in the first study, the date moved.

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

Claim: Its authors corrected it to about 107,000 years in 2004, and a 2010 study using three nuclear genes and a different statistical model placed the split before the migration out of Africa,

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.

What this does not establish

The 2004 erratum itself could not be read from this environment; its figure is taken from a 2009 commentary that reports it, and its date from the correction notice on the 2003 paper. The 2010 study calls its dates largely consistent with the corrected ones, though older than the original.

Corrected

24 September 2026. Previously: “What later work with more sequences and better calibration changed was the date, pushing it back far enough that clothing could not have been a response to leaving.” The first revision was the authors’ own erratum, which the page omitted. “Better calibration” is not what the 2010 study changed: both calibrate on the human and chimpanzee louse split; it used more genes and a Bayesian coalescent model. “Could not have been” was stronger than the 2010 study, whose interval reaches down to 29,000 years.

24 September 2026. Previously: “Its authors corrected it to about 107,000 years in 2004, and a 2010 study using more genes and a different statistical model placed the split before the migration out of Africa,” The 2003 study sequenced five gene segments (ND4, CYTB, EF-1α, RPII and COX1) and the 2010 study four, so “more genes” was wrong. What the 2010 study had more of was nuclear genes, three against two, which is what its recorded excerpt says.

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

Claim: which made clothing look less like a response to leaving.

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 2010 authors’ own reading: clothing was already available before modern humans left Africa.

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

Claim: The method survived; the story attached to the first number did not.

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 summary of claims 29 to 34. The method is still used, but whether it dates one event is disputed (claim 48).

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

The answer

Claim: The answer

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

Claim: A 2010 study reanalysed the published sequences of four louse genes and put the divergence at least by 83,000 years ago and possibly as early as 170,000. Those are its words.

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.

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africamethods

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

    The source reads: All available DNA sequences for COI (108 head and 58 clothing lice), 18S rRNA (10 head and 12 clothing lice), EF-1α (25 head and 9 clothing lice), and RPII (25 head and 10 clothing lice) for P. humanus and the outgroup P. schaeffi (chimpanzee louse) were downloaded from GenBank

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaabstract

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

    The source reads: we use a Bayesian coalescent modeling approach to estimate that clothing lice diverged from head louse ancestors at least by 83,000 and possibly as early as 170,000 years ago. Our analysis suggests that the use of clothing likely originated with anatomically modern humans in Africa

What this does not establish

A model estimate, not a measurement: it depends on the assumed louse generation time, the calibration and the model of one split with migration.

Later work looked for

Crossref and Europe PMC, 2011 on, "clothing lice" or "body lice" with "origin" or "divergence": no later study re-dates the split; a 2020 review (Amanzougaghene and others) still reports the 2010 date and adds the rival view that clothing lice arise repeatedly, now on the page.

Corrected

24 September 2026. Previously: “A 2010 study sequenced lice from around the world and estimated the divergence at at least 83,000 years ago and possibly as early as 170,000, in Africa. The paper states it that way round, as a floor with a long reach behind it, rather than as a date.” The study sequenced nothing: it downloaded all available sequences from GenBank. And its “at least by 83,000” is not a floor in the statistical sense (claim 38).

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

Claim: In its own table 83,000 is the single most probable value and 170,000 the median, and the 95 per cent interval runs from 29,000 to 691,000 years.

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.

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaresults and table 1

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

    The source reads: The posterior probability distribution for the head and clothing louse divergence time is characterized by a mode (i.e., the single estimate with the highest posterior probability) of 83 Ka and a median value of 170 Ka (95% HPD = 29–691 Ka; fig. 1).

What this does not establish

A posterior distribution from a model, so the interval is the model’s uncertainty, not a range of observed dates.

Later work looked for

Crossref and Europe PMC, 2011 on, "clothing lice" or "body lice" with "origin" or "divergence": no later study re-dates the split; a 2020 review (Amanzougaghene and others) still reports the 2010 date and adds the rival view that clothing lice arise repeatedly, now on the page.

Corrected

24 September 2026. Previously: “The paper states it that way round, as a floor with a long reach behind it, rather than as a date.” The page called 83,000 a floor. In the paper’s results it is the mode of the posterior, and the interval reaches down to 29,000.

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

Claim: The authors place the habit with anatomically modern humans in Africa, before they spread into colder latitudes, and note that the median falls at the start of an ice age, about 190,000 to 130,000 years ago.

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 ice age is Marine Isotope Stage 6.

Corrected

24 September 2026. Previously: “That is long before people moved into cold northern latitudes, which had been the assumption about why clothing would be adopted, and it places the habit within the range of anatomically modern humans in Africa.” Attributed to the authors; “long before” did not hold across the study’s interval. Added the authors’ own note on the ice age.

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

How firm the date is

Claim: How firm the date is

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

Claim: A habit with no artefacts, dated by the parasite that needed it.

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 image. Artefacts of hide-working and sewing survive; regular wearing leaves no direct trace, as the 2003 study says.

  • Context

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: This ecological differentiation probably arose when humans adopted frequent use of clothing, an important event in human evolution for which there is no direct archaeological evidence.

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

How wide the uncertainty is

Claim: How wide the uncertainty is

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

Claim: Both studies calibrate their clock on the split between human and chimpanzee lice, taken to match the split between their hosts about five and a half million years ago,

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 2010 study sets a prior with a lower bound of 5 and a mean of 5.5 million years.

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion

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

    The source reads: the divergence time of 5.5 million years between humans and chimpanzees [5] also corresponds to the P. humanus-P. schaeffi divergence, and hence was used as a calibration point for molecular clocks

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africamethods

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

    The source reads: Rates were calibrated by placing an exponential prior distribution (lower bound = 5 Ma, mean = 5.5 Ma) on the divergence of P. humanus (human) and P. schaeffi (chimpanzee) lice that reflects conservatively recent estimates for the divergence of their hosts

Later work looked for

How the method works; not a finding later work revises.

Corrected

24 September 2026. Previously: “Molecular dating depends on a mutation rate and a calibration point, and small changes in either move the answer by tens of thousands of years.” No source read quantifies how far small changes move the answer. Replaced with what both studies actually calibrate on.

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

Claim: and the answer carries the uncertainty of that and of the mutation rate.

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 2010 study says its method carries the uncertainty in its parameters into the estimate.

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

Claim: The 2003 study put the origin at not more than about 72,000 years ago, give or take 42,000, before its correction; the 2010 interval is wider still.

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.

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingabstract

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

    The source reads: A molecular clock analysis indicates that body lice originated not more than about 72,000 ± 42,000 years ago

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion

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

    The source reads: Since all body lice sequences are subsumed within this combined head/body lice clade, this date is an upper bound for the origin of body lice

  • Supports

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaresults and table 1

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

    The source reads: The posterior probability distribution for the head and clothing louse divergence time is characterized by a mode (i.e., the single estimate with the highest posterior probability) of 83 Ka and a median value of 170 Ka (95% HPD = 29–691 Ka; fig. 1).

What this does not establish

The 2003 figure is an upper bound on the clothing louse’s age and was later revised (claim 33).

Later work looked for

Crossref and Europe PMC, 2011 on, "clothing lice" or "body lice" with "origin" or "divergence": no later study re-dates the split; a 2020 review (Amanzougaghene and others) still reports the 2010 date and adds the rival view that clothing lice arise repeatedly, now on the page.

Corrected

24 September 2026. Previously: “The 2003 study put the origin at not more than about 72,000 years ago, give or take 42,000; the 2010 one spans 83,000 to 170,000.” 83,000 to 170,000 is the mode and median, not the 2010 study’s span, which runs from 29,000 to 691,000; the 2003 figure was later corrected.

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

Claim: There is also a disagreement about what is being dated.

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

  • Context

    Where Are We With Human Lice? A Review of the Current State of KnowledgeTaxonomy section

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

    The source reads: Thus, the divergence of head and body lice is obviously not the result of a single event, but probably takes place constantly among the two shared louse clades A and D

Other readings

The dating studies treat the clothing louse as arising from one split; the review argues it arises repeatedly (claims 47 and 48).

Corrected

24 September 2026. Previously: “” Added: a rival view of how clothing lice arise bears directly on the method and was missing.

Claim 46 · checked 24 September 2026 · AI-assisted audit

Claim: The dating studies model one split.

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 2010 model allows migration between the two forms after the split.

Later work looked for

How the method works; not a finding later work revises.

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

Claim: A 2020 review by researchers in Marseille argues that clothing lice keep arising from head lice where infestations are heavy, so that the split is not a single event.

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

    Where Are We With Human Lice? A Review of the Current State of KnowledgeTaxonomy section

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

    The source reads: suggesting that under certain conditions of poor hygiene, an infestation of head lice can turn into a massive infestation, which has allowed variants (genetic or phenotypic) of head lice able of ingesting a large amount of blood, a typical characteristic of body lice, to colonize clothing

  • Supports

    Where Are We With Human Lice? A Review of the Current State of KnowledgeTaxonomy section

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

    The source reads: Thus, the divergence of head and body lice is obviously not the result of a single event, but probably takes place constantly among the two shared louse clades A and D

  • Context

    Where Are We With Human Lice? A Review of the Current State of Knowledgeauthor affiliations

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

    The source reads: Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, Marseille, France

  • Supports

    Apes, lice and prehistoryLice and clothing

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

    The source reads: More extensive phylogenetic analyses [16, 17] indicate that body lice evolved from head lice several times within the worldwide clade A

What this does not establish

A review, reporting its authors’ group’s own earlier work among others. It does not re-date the origin of clothing.

Later work looked for

Europe PMC, 2020 on, "body lice emergence head lice": nothing later found that settles the question.

Claim 48 · checked 24 September 2026 · AI-assisted audit

Claim: The same review still reports the 2010 date as evidence of early clothing.

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

    Where Are We With Human Lice? A Review of the Current State of KnowledgeHuman lice as markers of human evolution

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

    The source reads: As recently suggested by Toups et al. (2011), based on the molecular dating of body louse, the use of clothing would have started between 83,000 and 170,000 years previous to what was expected

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

Claim: The result is therefore best read as an order of magnitude, and as evidence that clothing is old rather than as 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.

Follows from claims 38, 45 and 48: an interval spanning more than an order of magnitude and a dispute over what the split dates.

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

What the archaeology adds

Claim: What the archaeology adds

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

Claim: Tools that may have scraped hides appear about 780,000 years ago, though hides had other uses and scrapers could have served for meat.

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

The 780,000-year date is the 2010 study citing an earlier excavation report, which this audit did not read.

Corrected

24 September 2026. Previously: “Hide-working tools appear in the record well before textiles.” Gave the date the sources give and kept their caveat that scrapers do not prove clothing.

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

Claim: Bone tools from a cave in Morocco, dated 120,000 to 90,000 years ago, were probably used on leather and fur, beside carnivore bones with skinning marks,

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

One site. The tools’ use is inferred from their shape and wear; the authors say “likely”.

Later work looked for

Europe PMC, 2021 on, "Contrebandiers Cave" and "bone tools fur": nothing that revises it.

Corrected

24 September 2026. Previously: “The archaeological sequence from scraping a hide to fitting a garment is the subject of the second work cited here, whose text this page could not read.” The sentence rested on a work read only as a bibliographic record (Gilligan 2010), which is removed. Replaced with a readable 2021 study of hide and fur working in the range the lice give.

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

Claim: and their excavators read them as highly suggestive, if indirect, evidence of the earliest clothing.

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.

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

Claim: Eyed needles, which point to fitted garments, appear about 40,000 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

    Origin of Clothing Lice Indicates Early Clothing Use by Anatomically Modern Humans in Africaintroduction, second paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: Eyed needles first appear in the archaeological record ∼40 Ka (Delson et al. 2000), but these signal the production of more complex clothing (e.g., tailored multilayered garment assemblages)

  • Supports

    Molecular Evolution of Pediculus humanus and the Origin of Clothingresults and discussion, final paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: archaeological evidence does not contradict an association of clothing specifically with modern humans, as the only tools that can be definitely associated with clothing, such as needles, are only about 40,000 years old

What this does not establish

Both studies cite the needle date from earlier archaeological work, which this audit did not read.

Later work looked for

Crossref, 2010 on, "earliest eyed needles sewing Palaeolithic": no result in the search that changes the date; not searched beyond Crossref.

Corrected

24 September 2026. Previously: “” Restored with the two studies that carry it, now that the passage no longer rests on an unread source.

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

Claim: Those mark different things: working a hide, and fitting a garment.

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 52 to 55.

Corrected

24 September 2026. Previously: “Those mark different things: scraping a hide, and fitting a garment.” Matches the broader hide and fur working now described.

Claim 56 · checked 24 September 2026 · AI-assisted audit

Claim: The lice date something between the two, the regular wearing of clothes, and the Moroccan tools fall inside the range the 2010 study gives for it.

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.

120,000 to 90,000 years lies inside the 2010 interval of 29,000 to 691,000, and near its 83,000 mode and 170,000 median.

Corrected

24 September 2026. Previously: “The lice date the middle stage, which leaves no tools at all.” “No tools at all” was too strong once the fur-working tools are on the page.

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

What was read