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— CH. 1 · DISCOVERY AND RECOVERY —

Ust'-Ishim man

~2 min read · Ch. 1 of 6
6 sections

  • A sculptor named Nikolai Peristov stood on the bank of the Irtysh River in 2008. He spotted a bone protruding from the earth near Ust-Ishimsky District. The object was a left femur belonging to a male hunter-gatherer. Peristov recognized the material as mammoth ivory but noticed human characteristics upon closer inspection. He brought the fossil to a forensic investigator who confirmed it might be human origin. This single bone became the key to unlocking ancient genetic history.

  • Scientists at the Max Planck Institute for Evolutionary Anthropology examined the specimen in Leipzig, Germany. Carbon dating established that the fossil dates back 45,000 years ago. It stands as the oldest human fossil to receive such precise dating. Researchers found intact DNA within the bone structure. They successfully sequenced the complete genome to contemporary standards of quality. This achievement marked one of the oldest modern human genomes ever decoded.

  • The Y-DNA haplogroup K-M2308 defines the paternal lineage of this individual. Initial classification placed him only as K(xLT) before further research emerged. Studies by Poznik et al. in 2016 identified him as K2(xK2b,K2c,K2d,K2e). He tested positive for specific SNPs like M2308 without matching all criteria of K2a. His mitochondrial DNA belongs to haplogroup R*, differing from the root sequence by a single mutation. These lineages now appear across Eurasia and Oceania yet no direct descendants exist today.

  • Autosomal DNA places Ust'-Ishim man between early African dispersals and later population divergences. He lived at a point roughly 45,000 years ago when distinct populations were forming. The specimen is not closely related to groups migrating along South Asia or Central Asia. Instead he shares autosomal DNA with Tianyuan man found near Beijing dating from 42,000 to 39,000 years ago. Mal'ta boy who lived 24,000 years ago near Irkutsk also shows connection. La Braña man from modern Spain about 8,000 years ago provides another comparison point.

  • Analysis reveals humans interbred with Neanderthals between 86,000 and 37,000 years ago. Modern non-African genomes contain 1.5 to 2.1 percent Neanderthal origin in broken fragments. Ust'-Ishim man carries Neanderthal DNA in clusters instead of scattered pieces. This clustering indicates immediate aftermath of genetic interchange occurred during his lifetime. Genomic sequencing refined the estimated mating date between species to 52,000 and 58,000 years ago. No relationship with Denisovans has been checked for this specific individual.

  • Ust'-Ishim was equally related to modern East Asians and Oceanians alongside ancient West Eurasian populations like Goyet specimen. Modern Europeans show closer ties to other ancient remains rather than this Siberian fossil. A 2016 study identified modern Tibetans as having the most alleles in common with Ust'-Ishim man. Another 2017 study found Siberian and East Asian populations shared 38% ancestry with him. A 2021 study argued he showed no more affinity to any modern western or eastern Eurasian populations suggesting no contribution to later groups.

Common questions

Who discovered the Ust'-Ishim man fossil in 2008?

A sculptor named Nikolai Peristov found the left femur bone on the bank of the Irtysh River near Ust-Ishimsky District. He initially identified the material as mammoth ivory before noticing human characteristics upon closer inspection.

When did the Ust'-Ishim man live and how old is the specimen?

Carbon dating established that the fossil dates back 45,000 years ago. It stands as the oldest human fossil to receive such precise dating at the time of discovery.

What genetic haplogroups define the paternal and maternal lineages of Ust'-Ishim man?

The Y-DNA haplogroup K-M2308 defines the paternal lineage while his mitochondrial DNA belongs to haplogroup R*. Studies by Poznik et al. in 2016 identified him as K2(xK2b,K2c,K2d,K2e) with specific SNPs like M2308.

How much Neanderthal DNA does the Ust'-Ishim man carry compared to other modern humans?

Ust'-Ishim man carries Neanderthal DNA in clusters instead of scattered pieces found in most modern non-African genomes. Genomic sequencing refined the estimated mating date between species to 52,000 and 58,000 years ago.

Which modern populations share the most ancestry with the Ust'-Ishim man according to recent studies?

A 2016 study identified modern Tibetans as having the most alleles in common with Ust'-Ishim man. Another 2017 study found Siberian and East Asian populations shared 38% ancestry with him.

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All sources

22 references cited across the entry

  1. 1news45,000-Year-Old Man's Genome SequencedEwen Callaway
  2. 2journalA genome sequence from a modern human skull over 45,000 years old from Zlatý kůň in CzechiaKay Prüfer et al. — 2021
  3. 3journalPunctuated bursts in human male demography inferred from 1,244 worldwide Y-chromosome sequencesG David Poznik et al. — June 2016
  4. 4webK-M2308 YTree
  5. 5webK-Y28299 YTree
  6. 6journal", "A recent bottleneck of Y chromosome diversity coincides with a global change in cultureMonika Karmin et al. — 2015
  7. 7journalEarliest modern human genomes constrain timing of Neanderthal admixtureArev P. Sümer et al. — 20 February 2025
  8. 8webEarliest modern human sequenced22 October 2014
  9. 9journalGenome sequence of a 45,000-year-old modern human from western SiberiaQiaomei Fu, Heng Li, Priya Moorjani, Flora Jay, Sergey M. Slepchenko, Aleksei A. Bondarev, Philip L. F. Johnson, Ayinuer Aximu-Petri, Kay Prüfer, Cesare de Filippo, Matthias Meyer, Nicolas Zwyns, Domingo C. Salazar-García, Yaroslav V. Kuzmin, Susan G. Keates, Pavel A. Kosintsev, Dmitry I. Razhev, Michael P. Richards, Nikolai V. Peristov, Michael Lachmann, Katerina Douka, Thomas F. G. Higham, Montgomery Slatkin, Jean-Jacques Hublin, David Reich, Janet Kelso, T. Bence Viola & Svante Pääbo — 23 October 2014
  10. 10journalOldest human genome reveals when our ancestors had sex with NeandertalsLizzie Wade — 22 October 2014
  11. 11journalAncient DNA Links Native Americans With EuropeMichael Balter — 25 October 2013
  12. 12journalHow Farming Reshaped Our GenomesMichael Balter — 26 January 2014
  13. 13webHumans Broke Off Neanderthal Sex After Discovering EurasiaChoi, Charles Q. — 4 October 2012
  14. 14webNeanderthal Woman's Genome Reveals Unknown Human LineageChoi, Charles Q. — 18 December 2013
  15. 15journalAncient Jomon genome sequence analysis sheds light on migration patterns of early East Asian populationsTakashi Gakuhari et al. — 25 August 2020
  16. 16journalGenome sequence of a 45,000-year-old modern human from western SiberiaQiaomei Fu et al. — 23 October 2014
  17. 17journalThree-part ancestry for EuropeansAnn Gibbons — 5 September 2014
  18. 18journalThe genome sequence of a 45,000-year-old modern human from western SiberiaQiaomei Fu et al. — 23 October 2014
  19. 19journalAncestral Origins and Genetic History of Tibetan HighlandersDongsheng Lu — September 2016
  20. 20journalReconstructing genetic history of Siberian and Northeastern European populationsEmily H.M. Wong et al. — January 2017
  21. 21journalInitial Upper Palaeolithic humans in Europe had recent Neanderthal ancestryMateja Hajdinjak et al. — April 2021
  22. 22webGenetics and Material Culture Support Repeated Expansions into Paleolithic Eurasia from a Population Hub Out of Africa