The Denisovans, also called Denisova hominins, were an extinct group of early humans that lived in Asia during the Middle to Late Pleistocene, about 200,000 to 32,000 years ago. Scientists have learned most about Denisovans from DNA evidence. Although many fossils have been found and may be Denisovan, the first known Denisovans were identified from very few physical remains. Because of this, no official species name has been given to them. However, DNA and protein analysis of the Harbin skull, originally named Homo longi, proved it was a Denisovan. A 2025 study suggested that remains from six other sites in China, including a 1 million-year-old fossil called Yunxian man, are related to the Homo longi group and the genetically confirmed Denisovans.
The first Denisovan was discovered in 2010 through DNA from a small finger bone found in Siberia’s Denisova Cave in the Altai Mountains. DNA analysis showed Denisovans were closely related to Neanderthals. The cave was also used by Neanderthals at times. Later, more Denisovan remains were found in Denisova Cave, as well as in other locations like Baishiya Karst Cave on the Tibetan Plateau, Tam Ngu Hao 2 Cave in Laos, the Penghu Channel between Taiwan and mainland China, and Harbin in Manchuria.
DNA evidence suggests Denisovans had dark skin, hair, and eyes, and their body shape was similar to Neanderthals. The Harbin skull, like other early humans, had a long, low shape with large brow ridges, wide eye sockets, and a large mouth. Denisovan jawbones show they lacked a chin, like Neanderthals. Their faces were flat, similar to modern humans and Homo antecessor, but with larger noses, unlike Neanderthals. They had larger molars, like other early humans and australopithecines. Their brain size was similar to modern humans and Neanderthals.
Denisovans mixed their DNA with modern humans. About 5% of the DNA in Melanesians, Aboriginal Australians, and Filipino Negritos comes from Denisovans. Mainland Asians and Native Americans have about 0.2% Denisovan DNA. A 2018 study found South Asians had similar levels of Denisovan DNA as East Asians. Another study showed Oceanians had the highest Denisovan DNA (about 2.0%), while most Native Americans, East Asians, and South Asians had similar levels (about 0.1%). This suggests Denisovans lived across Asia. Scientists also found evidence that Denisovans interbred with Neanderthals, with 17% of their DNA from Neanderthals. A child with a Denisovan father and Neanderthal mother was discovered. Additionally, 4% of Denisovan DNA came from an unknown ancient human species that split from modern humans over one million years ago.
Taxonomy
A diagram showing the relationships between different human species, based on ancient proteins:
Homo neanderthalensis †
Denisovan: Homo longi (Harbin)†
A diagram of Homo longi (Denisovans) based on Feng et al., 2025: ★ indicates genetically confirmed Denisovans
Denisovans may represent a new species of Homo or an older group within Homo sapiens (modern humans). Before the Harbin cranium was identified as a Denisovan in June 2025 using mitochondrial DNA and protein analysis, there were not enough fossils to officially name the group. Proposed names for Denisovans without a clear type specimen include H. sapiens altaiensis or H. altaiensis (Derevianko, 2011), H. denisoviensis (Picq, 2011), H. denisovan (Gabriel & Mihaela, 2011), and H. denisova (Gunbin et al., 2012).
In 2025, Denné Reed argued that the informal name "Denisovans" is better than other proposed names for this group because the biological status of Denisovans as a separate evolutionary line is unclear. He said that "H. altaiensis" is a "naked name" because it lacks clear differences from other species and has no fixed type specimen. He also said that names like "Homo daliensis" and "Homo mapaensis" are conditionally proposed and not valid under ICZN rules, while "Homo tsaichangensis" is not valid because it lacks proper registration in ZooBank.
A study in 2024 suggested that Denisovans might belong to the conditional species Homo juluensis based on similarities between Denisovan and H. juluensis molars. This idea was later replaced by DNA evidence that classified Denisovans as Homo longi.
Older findings called "East Asian Archaics" have been linked to Denisovans in some studies but may not be part of the same group. These include the Dali skull, the Xujiayao hominin, the Xuchang crania, the Jinniushan human, the Hualongdong people, Yunxian Man, Maba Man, and the Narmada Human.
In 2021, Chinese scientist Qiang Ji and colleagues suggested that their newly named species, H. longi, might be the same as Denisovans based on the similarity between the molar of the type specimen and the Xiahe mandible. In 2024, scientists Christopher Bae and Xiujie Wu designated the Xujiayao fossils as the holotype of Homo juluensis, with Xuchang as the paratype. They proposed that Denisovans belong to this species and that the Dali Man and Jinniushan specimen should be classified as H. longi.
In 2025, Fu and colleagues extracted mitochondrial DNA from the dental calculus of the Harbin cranium (H. longi holotype) and found it matches the variation seen in seven previously sequenced Denisovan mitochondrial DNA samples. They also retrieved 95 endogenous proteins from the same specimen and confirmed that H. longi belongs to the Denisovan population.
In 2025, Feng and colleagues, who discovered the Harbin cranium in 2021 and named the species Homo longi, analyzed 104 ancient hominin cranial and mandibular specimens using 533 landmarks. They grouped Yunxian Man, Dali Man, the Hualongdong people, the Jinniushan human, the Xujiayao hominins, and Maba Man with genetically confirmed Denisovans under H. longi.
The Denisova Cave is located in Altai Krai, Russia, in south-central Siberia, on the western edges of the Altai Mountains. It is named after Denis (Dyonisiy), a Russian hermit who lived there in the 18th century. The cave was first studied in the 1970s by Soviet paleontologist Nikolai Ovodov, who was searching for canid remains.
In 2008, Russian archaeologists, including Michael Shunkov, found a juvenile female hominin finger bone in Denisova Cave. Initial dating placed it between 50,000 and 30,000 years ago, but later estimates suggest it is between 76,200 and 51,600 years old. The specimen was called "X-woman" because its mitochondrial DNA showed it was genetically distinct from modern humans and Neanderthals.
In 2019, Greek archaeologist Katerina Douka and colleagues radiocarbon dated specimens from Denisova Cave, estimating that Denisova 2 (the oldest Denisovan) lived between 195,000 and 122,700 years ago. Older Denisovan DNA from sediments in the East Chamber dates to 217,000 years ago. Evidence suggests Denisovans lived in the cave as early as 287,000 to 203,000 years ago. Neanderthals were also present in the cave between 193,000 and 97,000 years ago, possibly at the same time as Denisovans.
Fossils from multiple Denisovans in Denisova Cave have been identified through ancient DNA: Denisova 2, 3, 4, 8, 11, 19, 20, 21, and 25. A genetic analysis of these individuals showed that Denisova 19, 20, and 21 are the oldest, followed by Denisova 2, then Denisova 8. Denisova 3 and 4 lived around the same time. The mitochondrial DNA of Denisova 4 is very similar to Denisova 3, suggesting they belonged to the same population.
Denisova Cave contained the only known Denisovan fossils until 2019, when a team led by Fahu Chen, Dongju Zhang, and Jean-Jacques Hublin discovered a partial mandible in the Baishiya Karst Cave on the Tibetan Plateau. Known as the Xiahe mandible, the fossil was found by a Buddhist monk in 1980 and stored at Lanzhou University until 2010. Protein analysis showed it is closely related to Denisovans from Denisova Cave, and uranium dating indicated it is more than 160,000 years old. Environmental DNA later confirmed Denisovan mtDNA in sediment layers dated between 100,000 and 60,000 years ago. A 2024 study identified a Denisovan rib fragment dating to between 48,000 and 32,000 years ago.
In 2018, a team of Laotian, French, and American scientists found a human tooth in Tam Ngu Hao 2 (Dragon Cave 2) in Laos. The tooth is from a Denisovan and dates to around 160,000 years ago. The tooth is
Demographics
Denisovans are known to have lived in Siberia, Tibet, Laos, Taiwan, and Manchuria. The Xiahe mandible is the earliest recorded human presence on the Tibetan Plateau. Although their remains have been found in only these five locations, traces of Denisovan DNA in modern humans suggest they lived across East Asia.
In 2019, geneticist Guy Jacobs and colleagues identified three distinct Denisovan populations that contributed DNA to modern humans living in: Siberia and East Asia; New Guinea and nearby islands; and Oceania, as well as parts of Asia. Using a method called coalescent modeling, scientists found that the Denisova Cave Denisovans split from the second population about 283,000 years ago and from the third population about 363,000 years ago. This suggests that Denisovan groups had limited interaction with each other. Using a type of analysis on genetic segments, Jacobs estimated that DNA mixing with modern humans occurred about 29,900 years ago with the population related to New Guineans, and about 45,700 years ago with the population related to both New Guineans and Oceanians. A third wave of DNA mixing may have occurred in East Asia, but there is not enough evidence to determine the exact time. Denisovan DNA found in modern people in East Asia is more similar to the Denisovan DNA from the Altai Mountains than to Denisovan DNA found in Southeast Asia and Oceania.
In a 2024 study, scientist Danat Yermakovich, from the University of Tartu, discovered that people in Papua New Guinea living at different elevations have different Denisovan DNA. People in highland areas have DNA variations linked to early brain development, while those in lowland areas have variations linked to the immune system. Because modern Papuans and Australians have high levels of Denisovan DNA, scientists believe Denisovans may have crossed the Wallace Line into these regions, with little movement back west. This would make Denisovans the second known human species to cross the Wallace Line, after earlier Homo floresiensis. By this reasoning, Denisovans may also have lived in the Philippines alongside Homo luzonensis, which could be the same or a closely related species. These Denisovans may have needed to cross large bodies of water. Alternatively, the high levels of Denisovan DNA in modern Papuans may result from greater mixing among their ancestors before crossing the Wallace Line.
Over time, Denisova Cave changed from a warm, moderately humid forest with pine and birch trees to a tundra or forest-tundra landscape. In contrast, Baishiya Karst Cave is located at a high elevation, where temperatures are low, oxygen is scarce, and resources are limited. It was once thought only modern humans could live in such harsh high-altitude areas, but Denisovans may have also lived there. Denisovans are also believed to have lived in Southeast Asia. The Tam Ngu Hao 2 site may have been a closed forest environment.
Anatomy
The finger bone fits within the range of variation seen in modern human women. This is different from the large, strong molars, which are more similar to those of Middle to Late Pleistocene archaic humans. All the available molars fall outside the range of any Homo species except H. habilis and H. rudolfensis, and are more like those of australopithecines. The second molar is larger than those of modern humans and Neanderthals and is more similar to those of H. erectus and H. habilis. Like Neanderthals, the mandible had a gap behind the molars, and the front teeth were flattened. However, Denisovans did not have a high mandibular body, and the mandibular symphysis at the jaw's midline was more receding.
The Denisovan Harbin cranium, Homo longi, has a low and long skull, a receding forehead, an extremely wide upper face, a large nasal opening (possibly an adaptation to cold air), large and square eye sockets, thick brow ridges, flat cheekbones, a wide palate, large tooth sockets (suggesting a large mouth), and a broad skull base. The Harbin skull is the longest archaic human skull found so far and has the longest brow ridge of any archaic or modern cranium.
The Harbin cranium had a large brain, about 1,420 cubic centimeters, which is within the range of modern humans and Neanderthals but not other human species. However, post-orbital constriction (a narrowing of the braincase behind the eyes, which is absent in modern humans and relates to the frontal lobes) is more developed in H. longi than in Neanderthals, though not as much as in older human species.
Despite the wide face, it was flat, resembling modern humans, the ancient H. antecessor, and other Middle Pleistocene Chinese specimens. This flatness is likely an ancestral trait, not unique to modern humans.
The original describers linked the Harbin skull to the Xiahe mandible, believing H. longi lacked a chin, like other archaic humans. However, the lower jaw was not recovered. This lack of a chin is also seen in the Denisovan Penghu mandible.
Studies by Ni et al. (2021) and Bae and Wu (2024) group the Harbin cranium, Homo longi, with the Dali cranium and the Jinniushan skeleton into a Homo longi clade. Feng et al. (2025) include Yunxian Man, Dali Man, Hualongdong people, Jinniushan human, Xujiayao hominins, and Maba Man under H. longi alongside genetically confirmed Denisovans. This suggests the physical traits of these remains can also be applied to Denisovans in general.
Jinniushan has many post-cranial remains and is grouped with Homo longi in several studies, making it likely these remains belong to Denisovans. This allows a description of Denisovan body structure.
The Jinniushan fossil remains belong to one female individual. These include one cranium, six vertebrae (one cervical, five thoracic), one complete left os coxae (pelvic bone), one complete left ulna, one complete left patella (kneecap), two left ribs, and several hand and foot bones. Analysis of the pelvis in 2006 showed the individual was a woman. Like the Harbin cranium, the Jinniushan female had a large brain with a cranial capacity of 1,330 cubic centimeters. Using formulas, her estimated height was 168.78 ± 4.30 cm, and her estimated body weight was 78.6 kg. This makes her the largest female Denisovan specimen ever found, though within the range of modern human females.
The Denisovan genome from Denisova Cave has gene variants linked to dark skin, brown hair, and brown eyes in modern humans. It also has a variant near the EPAS1 gene, which helps Tibetans adapt to high altitudes, and a region involving the WARS2 and TBX15 loci, which affect body-fat distribution in the Inuit.
Culture
Early Middle Paleolithic stone tools found in Denisova Cave included cores, scrapers, denticulate tools, and notched tools. These tools were placed in the Main Chamber about 287±41 thousand years ago and in the South Chamber about 269±97 thousand years ago. Additional tools were found in the Main and East Chambers up to 170±19 thousand and 187±14 thousand years ago, respectively.
Middle Paleolithic tool collections were mostly made of flat, discoidal, and Levallois cores, with some sub-prismatic cores. The tools included side scrapers (used only on the sides), notched-denticulate tools, end-scrapers (used only on the ends), burins, chisel-like tools, and truncated flakes. These tools were dated to 156±15 thousand years ago in the Main Chamber, 58±6 thousand years ago in the East Chamber, and 136±26–47±8 thousand years ago in the South Chamber.
Early Upper Paleolithic artifacts were found in the Main Chamber about 44±5 thousand years ago, in the East Chamber about 63±6 thousand years ago, and in the South Chamber about 47±8 thousand years ago. Some layers in the East Chamber may have been disturbed. Blade and Levallois production were present, but scrapers remained common. A well-developed Upper Paleolithic stone bladelet technology, different from earlier scrapers, appeared in the Main Chamber around 36±4 thousand years ago.
Upper Paleolithic layers also contained bone tools and ornaments, such as a marble ring, ivory ring, ivory pendant, red deer tooth pendant, elk tooth pendant, chloritolite bracelet, and a bone needle. However, Denisovans are only confirmed to have lived in the cave until 55 thousand years ago. The dating of Upper Paleolithic artifacts overlaps with modern human migration into Siberia, but no evidence of modern humans has been found in the Altai region. DNA from a Denisovan specimen found in the cave is too old to confirm its species. The connection between these artifacts and Denisovans is unclear.
Inhabitants of Baishiya Karst Cave processed the bones of goats, cows, deer, horses, and woolly rhinoceroses. They also hunted large carnivores, such as cave hyenas, dogs, big cats, marmots, hares, and eagles. They may have used animal bones to make tools, and stone artifacts were found in every layer excavated.
In 1998, five child hand- and footprint impressions were discovered near Quesang hot springs in Tibet. In 2021, these impressions were dated to 226 to 169 thousand years ago using uranium decay dating. This is the oldest evidence of human presence on the Tibetan Plateau. The impressions may have been made by Denisovan children. The prints were made on a small area with little overlap, suggesting careful placement. If considered art, these are the oldest known examples of rock art. Similar hand stencils and impressions do not appear in the archaeological record until about 40,000 years ago.
The footprints include four right impressions and one left footprint placed on top of one of the right. They likely belonged to two individuals. The person who placed their left footprint on top of their right may have curled their toes or used their finger to shape the print. The footprints average 192.3 mm (7.57 in) long, which matches the size of a 7- or 8-year-old modern human child. Two sets of handprints were found, possibly made by an older child or someone with long fingers. The handprints average 161.1 mm (6.34 in), matching the size of a 12-year-old modern human child. One handprint also shows an impression of the forearm, and the individual may have wiggled their thumb in the mud.
In 2025, archaeologists found 35 wooden tools near an ancient lake at Gantangqing in Yunnan, China. These tools were found with stone tools, antler billets (soft hammers), and cut-marked bones. The tools are dated to between 361,000 and 250,000 years ago. The wooden tools include digging sticks made of pine and hardwood, hooks for cutting roots, and small, pointed tools.
Researchers stated that the people at Gantangqing used tools to access food resources near the lake, such as underground tubers, rhizomes, or corms. This suggests that early hominins relied on plant foods and planned trips to lakeshore areas to gather resources in a subtropical environment.
Interbreeding
Studies of modern human DNA show that humans interbred with at least two groups of ancient humans—Neanderthals and Denisovans—multiple times. Comparing the DNA of Denisovans, Neanderthals, and modern humans has revealed that these groups interbred in complex ways.
Up to 17% of the Denisovan DNA from Denisova Cave comes from Neanderthals. A Denisovan/Neanderthal hybrid, called Denisova 11, suggests interbreeding was common in this area. The Denisovan genome shares more genetic traits with Neanderthals from Siberia than with those from Croatia or the Caucasus, indicating gene flow from a group closely related to Siberian Neanderthals. However, Denisova 11’s father had DNA from Siberian Neanderthals, while her mother had DNA from a Neanderthal group more closely related to those in Croatia. Another Denisovan, Denisova 25, who lived about 200,000 years ago, had 5% of his DNA from a previously unknown Neanderthal group and belonged to a different Denisovan population than younger samples.
The MUC19 gene in Denisovans was also found in late Neanderthals from Siberia and Europe, showing that Neanderthals in both regions had Denisovan DNA. About 4% of the Denisovan genome comes from an unknown ancient human group that split from Neanderthals and humans over a million years ago. In Asia, the only known Homo species from the Late Pleistocene were H. erectus and H. heidelbergensis. However, recent studies reclassified some of these species as Homo longi and Homo juluensis.
Before splitting from Neanderthals, Denisovan ancestors migrated to Europe and interbred with an unknown "superarchaic" human group already living there. These superarchaics descended from an early migration out of Africa about 1.9 million years ago.
A 2011 study found that Denisovan DNA is present in higher levels in Papuans, Aboriginal Australians, Near Oceanians, Polynesians, Fijians, Eastern Indonesians, and the Aeta people of the Philippines. It is not found in East Asians, western Indonesians, the Jahai of Malaysia, or the Onge of the Andaman Islands. This suggests Denisovan DNA may have mixed with modern humans in the Pacific region rather than on the Asian mainland. In Melanesians, about 4–6% of their DNA comes from Denisovans. A 2021 study found that the Aeta people of the Philippines have more Denisovan DNA than Papuans, with the Aeta Magbukon in Luzon having the highest known Denisovan ancestry. In Papuans, Denisovan DNA is less common on the X chromosome and some autosomes, which might indicate challenges in mixing between Denisovans and modern humans.
In contrast, mainland Asians and Native Americans have only 0.2% Denisovan DNA. A 2018 study found that South Asians have similar levels of Denisovan DNA to East Asians. Another study showed the highest Denisovan DNA in Oceanians (~2.0%), while Americans, East Asians, and South Asians have similar levels (~0.1%). The discovery of a 40,000-year-old Chinese human with Denisovan DNA similar to modern East Asians suggests that Denisovan DNA was not simply diluted by later human migrations. A 2018 study of Han Chinese, Japanese, and Dai genomes found that East Asians have DNA from two different Denisovan groups: one similar to Denisovans in Papuans and another closer to Denisovans in Denisova Cave. This suggests two separate Denisovan introgression events. South Asians only have DNA from the same Denisovan group found in Papuans. A 2019 study identified a third wave of Denisovan DNA in East Asians, showing that introgression may not have happened immediately after modern humans arrived in the region.
Denisovan DNA likely mixed with modern humans in the Pacific region after Eurasians and Oceanians split about 50,000 years ago, but before Papuans and Aboriginal Australians split about 37,000 years ago. This may have occurred in Wallacea, though a 7,200-year-old Toalean girl from Sulawesi with Denisovan DNA suggests Sundaland could also be a possibility. Other early Sunda hunter-gatherers have little Denisovan DNA, which might mean the mixing happened elsewhere or was later diluted by mainland Asian DNA.
A version of the EPAS1 gene in modern Tibetans helps them live at high altitudes and likely came from Denisovans. Genes related to fat metabolism and smell are more active in people with more Denisovan DNA. Denisovan genes may also help modern humans resist some forms of the SARS-CoV-2 virus. These genes might have improved the immune systems of Papuans and helped them adapt to their environment.
In December 2023, scientists found that genes from Neanderthals and Denisovans may influence the daily habits of modern humans. In August 2025, a study found a Denisovan version of the MUC19 gene in many admixed American populations and in ancient Indigenous American DNA. This gene helps produce a protein in the eyes and is linked to strong genetic changes in modern humans. This Denisovan version of the gene is in a region also containing Neanderthal-specific genes, suggesting Neanderthals inherited it from Denisovans.
A 2025 study of ancient and modern DNA in Eurasia traced how Denisovan DNA spread through Northern and Western Eurasia. It found the highest Denisovan DNA in the 40,000-year-old Tianyuan man from northeast China, the first known member of the Ancestral East Asian population. Other findings from Sungir in Russia are still being studied.