The genetics: every sample, every result

Hair is easy to fake and hard to identify by eye. DNA is neither. Genetics should have settled this, and in a narrow sense it has. Here is every published study, with the places where the popular version of the story is wrong in both directions.

The claim that arrived by press release

In late November 2012, DNA Diagnostics, a veterinary genetics laboratory headed by Melba S. Ketchum, announced that a five-year study had confirmed a novel hominin hybrid species in North America. The Register covered it on November 28 and reported that the team had sequenced "20 whole mitochondrial genomes and three whole nuclear genomes." ALLEGED Sasquatch, the release said, arose about 15,000 years ago as "a half-human hybrid, the result of mating with modern human females."

The release also asked for legal standing: "Government at all levels must recognize them as an indigenous people and immediately protect their human and Constitutional rights against those who would see in their physical and cultural differences a 'license' to hunt, trap, or kill them." That framing is Ketchum's own. No Indigenous nation is on record endorsing it, and nothing in the study involved consultation with one. No paper came with the announcement, and no data. The paper did not appear for nearly three months.

The journal that appeared nine days early

On February 13, 2013, the study surfaced as "Novel North American Hominins: Next Generation Sequencing of Three Whole Genomes and Associated Studies," in the first and only issue of DeNovo. Press coverage renders the name variously, most often "DeNovo Scientific Journal."

Sharon Hill, writing for the Committee for Skeptical Inquiry, recorded what she found on trying to read it. The outlet "consists of one issue with only this one paper," access cost $30, and "the DeNovo website was created on February 4, 2013, just nine days prior to the release of the paper." DOCUMENTED

Ketchum's own account, posted the same day, was direct. She had encountered "the worst scientific bias in the peer review process in recent history," which she called "the Galileo Effect." A journal had accepted the paper, she said, then its legal counsel advised against publishing a manuscript on so controversial a subject, so rather than keep submitting, her team acquired the rights to that journal and renamed it in order to keep the passing reviews. ALLEGED

Hill reported that investigators traced the prior title to the Journal of Advanced Multidisciplinary Exploration in Zoology, registered under Ketchum's name on January 9, 2013. That identification does not rest on Hill alone. Kevin Harter, writing eight years later in a proponent journal and working from review documents posted on the Sasquatch Genome Project's own website, cites referee reports by "JAMEZ Referee A" and "JAMEZ Referee B" alongside earlier reports from Nature referees. DOCUMENTED DeNovo holds ISSN 2326-2869, listed as "DeNovo (Big Rapids, Mich.)." An ISSN is a catalog number issued on request and implies nothing about review.

What was actually in the Ketchum data

The most detailed audit came from the proponents' side: Haskell V. Hart's "DNA as evidence for the existence of relict hominoids," published in 2016 in The Relict Hominoid Inquiry, edited at Idaho State University by Jeff Meldrum. On the three nuclear genomes, samples 26, 31 and 140:

• They were assembled against human chromosome 11 as the reference, which Hart argues both shortened the resulting consensus sequences and biased them "toward only highly conserved human genes." Those consensus sequences ran to 2.7 million, 0.53 million and 2.1 million base pairs, which Hart puts at 0.4 to 2 percent of chromosome 11 and under 0.1 percent of a whole genome in each case. The reported "mosaic" of human and non-human sequence is, on his reading, what that method produces from a non-human animal. DEBUNKED
• Sample 26 is an American black bear. Across five datasets it matched black or polar bear at about 98 to 99 percent and human and other primates at 94 to 95 percent. Hart notes that black bear is the only extant bear in California, where sample 26 was collected, and that three other independent laboratories also identified it as black bear. Sample 140 is a dog, at about 99 percent identity to Canis lupus familiaris, though Hart allows it could less likely be a wolf or coyote. Sample 31 is human, which the paper itself also concluded. DEBUNKED
• Three independent analyses found the same second human mitochondrial contaminant in sample 26. The specific haplogroup call, T2b3e, is Hart's own; one of the laboratories declined to assign a haplogroup at all and another made a more conservative call of T2. Separately, one laboratory reported that sample 26's human nuclear alleles matched a control sample from the sample's submitter at 13 of 16 loci, with three loci giving no signal. Hart reads all of this as handling contamination. Ketchum and colleagues denied contamination in any sample. CONTESTED

Replication never happened, for the reason Hill noted: "The samples have not been made available to others so there is currently no way for anyone to run a retest to compare results." One sample did get retested elsewhere, in the next study.

Fifty-seven samples, thirty sequences

The University of Oxford and the Museum of Zoology, Lausanne, issued a joint call for material on May 14, 2012. Press coverage calls the collaboration the Oxford-Lausanne Collateral Hominid Project. The paper does not use that name, and no primary source I could find does either. Results were published online on July 2, 2014 in Proceedings of the Royal Society B (281: 20140161), by Bryan Sykes, Rhettman Mullis, Christophe Hagenmuller, Terry Melton and Michel Sartori. The authors thank "Harry Marshall and Icon Films for their contribution to the costs of analysis." Icon Films is a television production company.

The arithmetic. Fifty-seven samples arrived; two were not hair, one plant material and one glass fiber. Thirty-seven were selected for analysis, seven yielded nothing after repeated attempts, and thirty produced a 104 base pair fragment of the mitochondrial 12S rRNA gene. All thirty matched a known mammal at 100 percent identity. Sequences went to GenBank as KJ155696 through KJ155724 plus KJ607607. DOCUMENTED

One of those six black bears was Ketchum's sample 26. The single human hair, 25072 from Texas, was "identical to the revised Cambridge Reference Sequence," making it a modern human "of likely European matrilineal descent."

Two samples submitted from Russia as almasty came back as American black bear (25074) and raccoon (25075). Sykes and colleagues note that both species are native to North America. It is worth being precise about what that does and does not show, because the point is often overstated: the American black bear does not occur in Russia, but the common raccoon does, as an introduced species established in the Caucasus and elsewhere in the former Soviet Union since the mid-twentieth century. The black bear result is anomalous. The raccoon result is ordinary.

Norman MacLeod of the Natural History Museum, London, published a commentary alongside the paper (Proc. R. Soc. B 281:20140843). The citation is verifiable, but the article is closed access with no open copy, I could not read it, and so nothing here characterizes its argument.

The point usually credited to that commentary can be made from the study's own numbers instead. Of 55 hair samples received, 18 were never analyzed and 7 more gave no sequence, so 25 produced no data at all. And of the 30 sequences that worked, not one came from any non-human primate. Sykes's own results list ends with "one human, and no other primates," in Hart's summary of them, and Hart's independent re-running of all 30 GenBank sequences reproduced the same result.

The bear that was not a polar bear

Two samples behaved oddly. Number 25025 "came from an animal shot by an experienced hunter in Ladakh, India ca 40 years ago who reported that its behaviour was very different from a brown bear Ursus arctos with which he was very familiar." Number 25191 "was recovered from a high altitude (ca 3500 m) bamboo forest in Bhutan and was identified as a nest of a migyhur, the Bhutanese equivalent of the yeti." Both matched Ursus maritimus, and Sykes reported a 100 percent match to "a Pleistocene fossil more than 40 000 BP." He floated an unrecognized species, a color variant, or an ancient brown-polar hybrid lineage. CONTESTED

This is the part most people remember wrong, and it is worth being careful, because the correction has itself been oversold.

In February 2015, Ceiridwen Edwards and Ross Barnett showed in the same journal that the sequences matched GenBank accession GU573490, which they describe as "a modern U. maritimus individual from Diomede, Little Diomede Island, Alaska (isolate 495)." The GenBank record itself carries no locality qualifier at all, only "isolate 495," so the Little Diomede provenance is Edwards and Barnett's, not the database's. The Pleistocene sequence is a different accession, GU573488, differing by one base. The one diagnostic transition sits at position 1751, "in the middle of a run of six C bases, which is exactly the place to expect a damage artefact," since deamination of cytosine manufactures precisely that substitution in degraded DNA. They read the hairs as Himalayan brown bear, Ursus arctos isabellinus. DEBUNKED

Melton, Sartori and Sykes published a reply (Proc. R. Soc. B 282:20142434). I could not obtain its full text, and its argument is not characterized here.

Later that year, Eliécer Gutiérrez and Ronald Pine reached a more skeptical place still, in ZooKeys. Only four positions in the 104 base pair fragment differ between brown and polar bear, both species are polymorphic at them, and "in all of them at least some individuals of both species have the same nucleotide." Their conclusion cuts against everybody: "because in complete sequences of the 12S rRNA gene not even a single nucleotide consistently allows discrimination between Ursus arctos and Ursus maritimus, it is impossible to unambiguously assign a taxonomic identification, based on this gene, to the focal sequences." They judged brown bear the most parsimonious reading, not the demonstrated one. CONTESTED So the fragment never could have identified a polar bear, and it never could have identified a brown bear either.

What settled it was more sequence, not more argument. In 2017 Tianying Lan, Charlotte Lindqvist and colleagues sequenced 24 field and museum specimens from the region, nine of them "provided to us by the Reinhold Messner Museum and the Icon Film Company," the latter the same company that had helped fund Sykes. From a Ladakh hair which, "based on their shared collection locality and other anecdotal evidence obtained from Icon Films, our sample source, may come from the same specimen that Sykes et al. speculated represents an unknown or hybrid bear," they assembled a complete mitogenome. It grouped with Himalayan brown bear. DOCUMENTED

Twenty-three of the 24 specimens were bears: 14 Himalayan brown, 6 Tibetan brown, 1 Eurasian brown, and 2 Asian black. The exception was "one tooth sample collected from a stuffed exhibit at the Reinhold Messner Mountain Museum, which BLAST-matched dog (Canis lupus familiaris)." DOCUMENTED That is an identification, and it is all the paper claims. Lan and colleagues do not call the exhibit a fake or a hoax, and nothing published establishes who assembled it or what it was represented to be.

One detail nobody tells. The polar bear reference sequence Sykes matched, and the 2010 paper he cited for it, are Lindqvist's own work; the GenBank record shows GU573490 deposited by C. Lindqvist and S. C. Schuster on January 27, 2010. She published the sequence that produced the yeti-bear headline, then led the study that dissolved it.

Every published study

Two notes on that table. Hart traces the Milinkovitch hair to Peter Matthiessen's 1992 Himalayan expedition but does not give a country, and I could not open the paper to confirm one. Hart's text and reference list both date Coltman and Davis to 2005; Crossref gives the print issue as February 2006, volume 21, pages 60-61, and the Yukon provenance here rests on Hart.

Testing on television, and off it

Todd Disotell is the molecular anthropologist most associated with this material. His UMass Amherst faculty page gives a Cornell BA in 1985, an MA and PhD from Harvard in 1992, New York University from 1992 to 2019, and UMass Amherst from 2020. His listed research interests are "primate evolution, molecular evolution, analytical techniques of phylogenetic systematics, history of biological anthropology, human variation," and his biography there mentions cryptozoology and environmental DNA among past involvements.

With Natalia Reagan and host Dean Cain he ran the laboratory side of 10 Million Dollar Bigfoot Bounty, eight episodes on Spike between January 10 and February 21, 2014. The ten million dollars required proof that "must stand up to scientific testing." Nobody collected it; a $100,000 consolation prize went to the last remaining team.

His published position has held for over a decade. On the MonsterQuest sample characterized on air as suggestive of a non-human primate, he told MonsterTalk in 2009 that the sequence differed from human at one base, inside the range of modern human variation. On Ketchum's 15,000-year divergence: "If it's a primate that is so similar to us, that's only separated from us about 15,000 years ago, that's us." On the animal itself, to The World in 2014: "hundreds of 8-foot tall mammals running around North America, without one single shred of evidence? I find that difficult to believe."

Environmental DNA, and its real limitation

Animals shed DNA into soil, water and air, and metabarcoding recovers it. Kevin Leempoel, Trevor Hebert and Elizabeth Hadly compared soil eDNA at Stanford's Jasper Ridge preserve against an approximately nine-year camera-trapping record: "All mammals regularly recorded with cameras were detected in eDNA. In addition, eDNA reported many unrecorded small mammals whose presence in the study area is otherwise documented." Masayuki Ushio and colleagues recovered six mammal species from "five 500-ml water samples from ponds in two cool-temperate forests in Hokkaido, northern Japan." DOCUMENTED

The fair objection is real, and it comes from the eDNA researchers themselves. Metabarcoding identifies organisms by matching a reference database, so a sequence from an animal with no reference entry does not come back labeled "new great ape." It comes back unassigned. Leempoel and colleagues end their abstract by saying "mitochondrial reference databases need to be enriched first." "eDNA surveys have not found sasquatch" is therefore weaker than it sounds. What can be said is narrower: an unassignable, primate-adjacent sequence from Pacific Northwest forest soil would be spectacular and trivially publishable, and no such report has appeared.

What a great ape drags behind it

A large primate is a genome plus everything living on it and in it, and those leave signals of their own. Pinworms track primate phylogeny closely. Jean-Pierre Hugot's 1999 analysis in Systematic Biology (48:523-546) maps the enterobiine genera onto primate groups: Lemuricola with strepsirrhines, Trypanoxyuris with platyrrhines, Enterobius with catarrhines. A North American great ape would be expected to carry its own Enterobius. No such species has been described, though this is an absence in the literature rather than the result of a search anyone has published.

Parasites can also find a host nobody has sampled directly. In 2010 Weimin Liu and colleagues screened "nearly 3,000 specimens" of ape feces from field sites across central Africa and showed that human Plasmodium falciparum falls inside the radiation of parasites carried by western gorillas. The malaria parasite of hundreds of millions of people was traced to gorillas through their droppings. David Reed and colleagues had already shown that human head lice comprise two ancient lineages diverging about 1.18 million years ago, which they argued requires "a recent host switch from an archaic species of Homo to modern H. sapiens." Louse genetics pointed at contact with an archaic hominin before anyone had its genome. DOCUMENTED

The caveat, because overclaiming is the failure this entry documents: nobody has searched black bear or deer genomes, or their parasites, for a large competitor's footprint. The narrower point is that the methods capable of finding a concealed hominin exist, work on scraps, and have been pointed at this evidence repeatedly.

What a negative result is worth

Sykes wrote the fair version himself: "While it is important to bear in mind that absence of evidence is not evidence of absence and this survey cannot refute the existence of anomalous primates, neither has it found any evidence in support." Twenty-five hair samples in that study alone were never analyzed or yielded nothing, and science has nothing to say about them. Hart, in the proponents' own journal, wrote: "None of the six published DNA studies to date have yielded any credible evidence for the existence of a relict hominoid."

Then the fairer point. Each test was a chance to be surprised, under about the most favorable conditions this question will ever get. Submitters chose their best material, museum collections were opened, sequencing was cheap, and the Oxford protocol was rigorous enough to strip a human contaminant a previous laboratory had reported as a finding. Under the hypothesis that breeding populations of large unknown apes live in North America and the Himalaya, this run of results is unlikely. Under the hypothesis that sincere people collect bear, cow, horse, deer and their own hair, it is what you would expect. That does not prove absence. It is a prior that has moved repeatedly in one direction.

Sources

• Bryan C. Sykes, Rhettman A. Mullis, Christophe Hagenmuller, Terry W. Melton, Michel Sartori, "Genetic analysis of hair samples attributed to yeti, bigfoot and other anomalous primates," Proceedings of the Royal Society B 281:20140161 (published online July 2, 2014). Full text, Table 1, funding and acknowledgements read via the Europe PMC full-text XML. https://pmc.ncbi.nlm.nih.gov/articles/PMC4100498/
• C. J. Edwards and R. Barnett, "Himalayan 'yeti' DNA: polar bear or DNA degradation? A comment on 'Genetic analysis of hair samples attributed to yeti' by Sykes et al. (2014)," Proceedings of the Royal Society B 282:20141712 (February 7, 2015). https://pmc.ncbi.nlm.nih.gov/articles/PMC4298200/
• Eliécer E. Gutiérrez and Ronald H. Pine, "No need to replace an 'anomalous' primate (Primates) with an 'anomalous' bear (Carnivora, Ursidae)," ZooKeys 487:141-154 (March 16, 2015). Full text read via Europe PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC4366689/
• Tianying Lan, Stephanie Gill, Eva Bellemain, Richard Bischof, Muhammad Ali Nawaz, Charlotte Lindqvist, "Evolutionary history of enigmatic bears in the Tibetan Plateau-Himalaya region and the identity of the yeti," Proceedings of the Royal Society B 284:20171804 (2017). Full text read via the Europe PMC full-text XML. https://pmc.ncbi.nlm.nih.gov/articles/PMC5740279/
• GenBank accession GU573490, Ursus maritimus isolate 495, complete mitochondrial genome, submitted by C. Lindqvist and S. C. Schuster, 27-JAN-2010, citing Lindqvist et al., PNAS 107:5053-5057 (2010). Record retrieved through the NCBI eutils service; it carries no country, locality or collection-date qualifier. https://www.ncbi.nlm.nih.gov/nuccore/GU573490
• Haskell V. Hart, "DNA as evidence for the existence of relict hominoids," The Relict Hominoid Inquiry 5:8-31 (2016). Full PDF read. https://www.isu.edu/media/libraries/rhi/research-papers/HART-DNA-Evidence.pdf
• Kevin Leroy Harter, "Does mitochondrial introgression explain the Sasquatch Genome Project data better than a human hybrid of recent origin?," The Relict Hominoid Inquiry 10:77-112 (2021). Full PDF read. A proponent essay, used here only for its references to the JAMEZ and Nature referee reports posted by the Sasquatch Genome Project. https://www.isu.edu/media/libraries/rhi/essays/HARTER-FINAL.pdf
• Sharon Hill, "The Ketchum Project: What to Believe about Bigfoot DNA 'Science'," Skeptical Briefs 23.1, Committee for Skeptical Inquiry, September 12, 2013. https://skepticalinquirer.org/newsletter/the-ketchum-project-what-to-believe-about-bigfoot-dna-science/
• Benjamin Radford, "Bigfoot DNA discovered at last? Not so fast," NBC News / LiveScience, February 14, 2013 (source for 111 samples from 34 sites, the full paper title, and the Disotell quotation on the 15,000-year divergence). https://www.nbcnews.com/sciencemain/bigfoot-dna-discovered-last-not-so-fast-1c8380637
• Iain Thomson, "Boffin claims Bigfoot DNA reveals BESTIAL BONKING," The Register, November 28, 2012 (source for the 20 whole mitochondrial and three whole nuclear genomes). https://www.theregister.com/2012/11/28/bigfoot_dna_analysis/
• "'Bigfoot DNA' study seeks Yeti rights," Discovery News via Fox News, February 17, 2013 (source for the quoted passage of the Ketchum press release and the half-human hybrid claim). https://www.foxnews.com/science/bigfoot-dna-study-seeks-yeti-rights
• "Melba Ketchum Bigfoot DNA Results To Be Published," Ghost Theory, February 13, 2013 (source for Ketchum's statements about peer review, the "Galileo Effect," and the acquisition of the journal). https://www.ghosttheory.com/2013/02/13/melba-ketchum-bigfoot-dna-results-to-be-published-and-a-new-video
• ISSN Portal record, ISSN 2326-2869, DeNovo (Big Rapids, Mich.). https://portal.issn.org/resource/ISSN/2326-2869
• Andrea Crossan, "Is Bigfoot a big myth? A new study testing hair DNA finds no proof," The World (PRX), July 9, 2014 (source for the quoted Disotell remark). https://theworld.org/stories/2014/07/09/bigfoot-big-myth-dna-testing-finds-most-samples-are-bears
• MonsterTalk episode 001, "Bigfoot DNA," Blake Smith and Karen Stollznow with Todd Disotell, July 2, 2009 (source for the single-base MonsterQuest sample). https://www.monstertalk.org/001-bigfoot-dna/
• University of Massachusetts Amherst, Department of Anthropology, faculty page for Todd Disotell (degrees, dates, research interests, biography). https://www.umass.edu/anthropology/about/directory/todd-disotell
• Kevin Leempoel, Trevor Hebert, Elizabeth A. Hadly, "A comparison of eDNA to camera trapping for assessment of terrestrial mammal diversity," Proceedings of the Royal Society B 287:20192353 (January 15, 2020). Abstract read via Europe PMC. https://doi.org/10.1098/rspb.2019.2353
• Masayuki Ushio, Hisato Fukuda, Toshiki Inoue et al., "Environmental DNA enables detection of terrestrial mammals from forest pond water," Molecular Ecology Resources 17(6):e63-e75 (November 2017). https://doi.org/10.1111/1755-0998.12690
• Jean-Pierre Hugot, "Primates and Their Pinworm Parasites: The Cameron Hypothesis Revisited," Systematic Biology 48(3):523-546 (1999). Citation verified via Crossref. https://doi.org/10.1080/106351599260120
• Weimin Liu et al., "Origin of the human malaria parasite Plasmodium falciparum in gorillas," Nature 467:420-425 (2010). Abstract read via Europe PMC. https://doi.org/10.1038/nature09442
• David L. Reed, Vincent S. Smith, Shaless L. Hammond, Alan R. Rogers, Dale H. Clayton, "Genetic analysis of lice supports direct contact between modern and archaic humans," PLoS Biology 2(11):e340 (2004). Abstract read via Europe PMC. https://doi.org/10.1371/journal.pbio.0020340
• D. Coltman and C. Davis, "Molecular cryptozoology meets the Sasquatch," Trends in Ecology & Evolution 21(2):60-61 (February 2006). Citation and date verified via Crossref; the paper itself was not opened, and its content is reported here through Hart 2016. https://doi.org/10.1016/j.tree.2005.11.010
• M. Milinkovitch, A. Caccone, G. Amato, "Molecular phylogenetic analyses indicate extensive morphological convergence between the 'yeti' and primates," Molecular Phylogenetics and Evolution 31(1):1-3 (April 2004). Citation and authorship verified via Crossref and Semantic Scholar; the paper itself was not opened, and its content is reported here through Hart 2016. https://doi.org/10.1016/j.ympev.2004.01.009
• Norman MacLeod, "Molecular analysis of 'anomalous primate' hair samples: a commentary on Sykes et al.," Proceedings of the Royal Society B 281:20140843 (2014). Citation verified via Europe PMC and Semantic Scholar. Unpaywall reports the article as closed with no open copy, every route to the full text failed, and its argument is not characterized here. https://doi.org/10.1098/rspb.2014.0843
• Terry W. Melton, Michel Sartori, Bryan C. Sykes, "Response to Edward and Barnett," Proceedings of the Royal Society B 282:20142434 (February 7, 2015). Citation verified via Europe PMC (the published title does read "Edward"). Full text not obtained, and its argument is not characterized here. https://doi.org/10.1098/rspb.2014.2434
• Wikipedia, "10 Million Dollar Bigfoot Bounty" (network, dates, episode count, hosts, prize structure). Accessed September 2026.