The Denisovans, also called Denisova hominins, were an ancient group of humans that lived in Asia between about 200,000 and 32,000 years ago. Most information about them comes from DNA found in fossils. The first Denisovans were discovered from very few remains, so scientists have not yet given them a formal species name. However, DNA and proteins from a skull found in Harbin, named Homo longi, confirmed it belonged to the Denisovans. A 2025 study suggested that remains from six other sites in China, including a 1-million-year-old fossil called Yunxian man, may be related to the Homo longi group and the genetically confirmed Denisovans.

The first Denisovan was identified in 2010 through DNA taken from a child’s finger bone found in Siberia’s Denisova Cave in 2008. Their DNA shows they were closely related to Neanderthals. The cave was also used by Neanderthals. Other Denisovan remains were later found in caves in Tibet, Laos, between Taiwan and mainland China, and in Harbin, China.

DNA suggests Denisovans had dark skin, hair, and eyes, and a body type similar to Neanderthals. Their skulls were long and low, with thick eyebrows, large eye sockets, and wide mouths. Their jawbones lacked a chin, like Neanderthals, but their faces were flatter than Neanderthals’ and had larger noses. Their molars were bigger, like those of older human relatives. Their brain size was similar to modern humans and Neanderthals.

Denisovans mixed 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 to East Asians. Oceanians have the highest Denisovan DNA (about 2.0%), while most other groups have about 0.1%. This suggests Denisovans lived across Asia. They also mixed with Neanderthals, with 17% of their DNA coming from Neanderthals. A child named “Denny,” with a Denisovan father and Neanderthal mother, was discovered. About 4% of Denisovan DNA comes from an unknown ancient human group that split from modern humans over a million years ago.

Taxonomy

A cladogram based on palaeoproteomics shows:
– Homo neanderthalensis †
– Denisovan: Homo longi (Harbin) †

A cladogram of Homo longi (Denisovans) based on Feng et al., 2025: ★ indicates genetically confirmed Denisovans.

Denisovans may represent a new species of Homo or an ancient subspecies of Homo sapiens (modern humans). Before the Harbin cranium was identified as a Denisovan in June 2025 using mitochondrial DNA and proteomics, there were not enough fossils to officially classify them as a distinct group. Proposed names for Denisovans without proper type specimens include H. sapiens altaiensis, H. denisoviensis, H. denisovan, and H. denisova.

In 2025, Denné Reed argued that the informal name "Denisovans" is better for referring to this group because its biological status as an independent evolutionary lineage is uncertain. He stated that H. altaiensis is a "naked name" because it lacks a clear description, a type specimen, and proper evidence for naming a new species. He also noted that Homo daliensis and Homo mapaensis are conditionally proposed and thus unavailable under the rules of the International Code of Zoological Nomenclature (ICZN). The name Homo tsaichangensis is considered unpublished and unavailable because it lacks evidence of registration in ZooBank, as required by ICZN articles 8.5.3.1 and 8.5.3.2.

Research in 2024 suggested classifying Denisovans as part of the conditional species Homo juluensis based on similarities between Denisovan and H. juluensis molars. This classification was later changed to Homo longi after DNA evidence confirmed the connection.

Some older findings, such as the Dali skull, Xujiayao hominin, Xuchang crania, Jinniushan human, Hualongdong people, Yunxian Man, Maba Man, and Narmada Human, have been linked to Denisovans in studies but may or may not belong to the same group.

In 2021, Chinese palaeoanthropologist Qiang Ji and colleagues proposed that their newly described species, H. longi, might represent Denisovans based on the similarity between the type specimen’s molar and the Xiahe mandible. In 2024, Christopher Bae and Xiujie Wu designated the Xujiayao fossils as the holotype of Homo juluensis and suggested that Denisovans should be classified under this species. They also recommended placing the Dali Man and Jinniushan specimen into 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 genetic variation of 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 first described the Harbin cranium in 2021 and named Homo longi, conducted a morphometric analysis of 104 ancient hominin cranial and mandibular specimens using 533 landmarks. They grouped Yunxian Man, Dali Man, Hualongdong people, Jinniushan human, Xujiayao hominins, and Maba Man into H. longi alongside genetically confirmed Denisovans.

The Denisova Cave is located in Altai Krai, Russia, in south-central Siberia, near the western edge of the Altai Mountains. It is named after Denis (Dyonisiy), a Russian Old Believer who lived there in the 18th century. The cave was first examined for fossils in the 1970s by Soviet paleontologist Nikolai Ovodov, who was searching for canid remains.

In 2008, Michael Shunkov and other Russian archaeologists discovered a juvenile female hominin finger bone in the cave, initially dated to 50–30,000 years ago. Later estimates placed its age at 76,200–51,600 years. The specimen was called "X-woman" because its mitochondrial DNA showed it belonged to a new ancient hominin group, distinct from modern humans and Neanderthals.

In 2019, Katerina Douka and colleagues radiocarbon dated specimens from Denisova Cave, finding that Denisova 2 (the oldest Denisovan specimen) lived 195,000–122,700 years ago. Older Denisovan DNA from sediments in the East Chamber dates to 217,000 years ago. Evidence suggests Denisovans occupied the cave as early as 287±41 or 203±14 thousand years ago. Neanderthals were also present 193±12 and 97±11 thousand years ago, possibly overlapping with Denisovans.

Fossils from multiple Denisovan individuals in Denisova Cave have been identified through ancient DNA: Denisova 2, 3, 4, 8, 11, 19, 20, 21, and 25. A phylogenetic analysis of their mitochondrial DNA showed Denisova 19, 20, and 21 are the oldest, followed by Denisova 2, then Denisova 8. Denisova 3 and 4 were roughly contemporary. The mtDNA of Denisova 4 closely matched that of 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 described a partial mandible found in 1980 in the Baishiya Karst Cave on the Tibetan Plateau. Known as the Xiahe mandible, it was stored at Lanzhou University until 2010. Protein analysis showed its collagen closely matched that of Denisovans from Denisova Cave. Uranium dating indicated it was over 160,000 years old. Environmental DNA later confirmed Denisovan mtDNA in sediment layers from 100,000 to 60,000 years ago. A 2024 reanalysis identified a Denisovan rib fragment dating to 48,000–60,000 years ago.

In 2025, a study found the genetic diversity among Denisovans from Denisova Cave 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 genes to modern human groups in different regions: Siberia and East Asia; New Guinea and nearby islands; and Oceania, as well as parts of Asia. Using a scientific method called coalescent modeling, researchers found that the Denisovan group from Denisova Cave split from the second group about 283,000 years ago and from the third group about 363,000 years ago. This suggests that Denisovan groups had limited contact with one another. Using another method to analyze DNA segments, Jacobs estimated that Denisovan genes mixed with modern humans around 29,900 years ago with the group related to New Guineans, and about 45,700 years ago with the group related to both New Guineans and Oceanians. A third wave of Denisovan genes may have mixed with East Asian populations, but there is not enough DNA evidence to determine the exact time. DNA from Denisovans found in East Asia is more similar to the Denisovan genome from the Altai Mountains than to Denisovan DNA found in Southeast Asia and Oceania.

In a 2024 study, scientist Danat Yermakovich of the University of Tartu found that people in Papua New Guinea living at different elevations have different Denisovan DNA. People in highland areas have genetic 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 them the second known human species to cross the Wallace Line, after earlier Homo floresiensis. This pattern might also mean Denisovans 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, high Denisovan DNA in modern Papuan populations could reflect greater mixing among their ancestors before crossing the Wallace Line.

Denisova Cave changed over time, shifting from a warm and moderately humid pine and birch forest to a tundra or forest-tundra landscape. In contrast, Baishiya Karst Cave is located at a high elevation, where temperatures are low, oxygen levels are low, and resources are scarce. Previously, it was thought only modern humans could live in such high-altitude areas. Denisovans also lived in Southeast Asia. The Tam Ngu Hao 2 site may have been a closed forest environment.

Anatomy

The finger bone is 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 ancient humans from the Middle to Late Pleistocene era. All the available molars fall outside the range of any Homo species except H. habilis and H. rudolfensis. These molars are more similar to those of australopithecines. The second molar is larger than those of modern humans and Neanderthals and more similar to those of H. erectus and H. habilis. Like Neanderthals, the jaw had a gap behind the molars, and the front teeth were flattened. However, Denisovans did not have a high jaw body, and the jaw's middle part was more recessed.

The Denisovan Harbin cranium, known as 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 base of the skull. The Harbin skull is the longest archaic human skull found so far. It also has the longest brow ridge of any archaic or modern human skull.

The Harbin cranium had a brain size of about 1,420 cubic centimeters, which is larger than all known human species except modern humans and Neanderthals. However, the braincase near the eyes (post-orbital constriction) is more developed in H. longi than in Neanderthals, though less than in older human species.

Despite the wide face, it was flat, similar to 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 researchers believed the Harbin skull was closely related to the Xiahe mandible, suggesting H. longi lacked a chin, like other ancient 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 group. Feng et al. (2025) also group Yunxian Man, Dali Man, the Hualongdong people, the Jinniushan human, the Xujiayao hominins, and Maba Man with H. longi, including genetically confirmed Denisovans. This means the physical traits of these remains can also apply to Denisovans.

Because Jinniushan has many post-cranial remains and is grouped with Homo longi in studies, it is likely these remains also belong to Denisovans. This would allow scientists to describe the body structure of Denisovans.

The Jinniushan fossil remains belong to one female individual. These include one cranium, six vertebrae (one cervical, five thoracic), one complete left pelvic bone, one complete left ulna, one complete left 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 a formula, scientists estimated her height as 168.78 ± 4.30 cm and her weight as 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 variations linked to dark skin, brown hair, and brown eyes in modern humans. It also includes a variation near the EPAS1 gene, which helps Tibetans adapt to high elevations, and a variation near the WARS2 and TBX15 genes, 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 tools were mostly flat, discoidal, and Levallois cores, with some sub-prismatic cores. Side scrapers (tools used only on the sides) were common, along with notched-denticulate tools, end-scrapers (tools 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.

In Upper Paleolithic layers, bone tools and ornaments were found, including a marble ring, an ivory ring, an ivory pendant, a red deer tooth pendant, an elk tooth pendant, a chloritolite bracelet, and a bone needle. However, Denisovans are confirmed to have lived in the cave until 55 thousand years ago. The dates of Upper Paleolithic artifacts overlap with the arrival of modern humans in Siberia, but no human remains have been found in the Altai region. DNA from a Denisovan specimen found in the cave is too old to confirm its species, so the tools’ origins remain unclear.

Inhabitants of Baishiya Karst Cave processed goat antelopes, cows, deer, horses, and woolly rhinoceroses. They also hunted large carnivores, such as cave hyenas, dogs, and big cats, as well as 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. Since the Xiahe mandible is the oldest human fossil from the region (but younger than the Quesang impressions), these may have been made by Denisovan children. The impressions were made on a small area, with little overlap between prints, suggesting the children intentionally created new imprints in unused space. 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 overlapping a right one. They were likely made by two individuals. The individual who overlapped their left footprint on a right one may have curled their toes or used a finger to dig into the mud. The footprints average 192.3 mm (7.57 in) long, which matches the size of a 7- or 8-year-old child by modern growth rates. Two sets of handprints, from a left and right hand, may have been made by an older child or by one of the two individuals with longer fingers. The handprints average 161.1 mm (6.34 in), matching a 12-year-old child, with one handprint showing an impression of the forearm and a wiggled thumb.

In 2025, archaeologists found 35 wooden tools near an ancient lake at Gantangqing in Yunnan, China. These tools, dated to 361,000 to 250,000 years ago, were found with stone tools, antler billets, and cut-marked bones. The wooden tools include digging sticks made of pine and hardwood, hooks for cutting roots, and small pointed tools. Researchers suggest that early hominins at Gantangqing used these tools to access underground plant foods like tubers and rhizomes. This shows that plant foods were important in their diets in a subtropical environment.

Interbreeding

Analyses of modern human genomes show that humans interbred with at least two groups of ancient humans—Neanderthals and Denisovans—multiple times. Comparing the genomes of Denisovans, Neanderthals, and modern humans has revealed a complex pattern of interbreeding among these groups.

Up to 17% of the Denisovan genome from Denisova Cave includes DNA from local Neanderthals. A Denisovan/Neanderthal hybrid, known as Denisova 11, suggests interbreeding may have been common in that region. The Denisovan genome shares more genetic traits with the Altai Neanderthal genome from Siberia than with Neanderthal genomes from Croatia or the Caucasus, indicating gene flow from a population closely related to Altai Neanderthals. However, Denisova 11’s father had genetic traits from Altai Neanderthals, while her mother’s DNA was more similar to Neanderthals from Croatia. A Denisovan individual, Denisova 25, who lived about 200,000 years ago, inherited 5% of his genome from a previously unknown Neanderthal population, and he came from a different Denisovan group than younger samples.

The Denisovan version of the MUC19 gene 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 species that split from Neanderthals and humans over a million years ago. The only known human species in Late Pleistocene Asia were H. erectus and H. heidelbergensis, though some specimens were later classified as Homo longi and Homo juluensis.

Before splitting from Neanderthals, their ancestors, called "Neandersovans," moved into Europe and interbred with an unknown "superarchaic" human group already living there. These superarchaics descended from an early migration out of Africa around 1.9 million years ago.

A 2011 study found Denisovan DNA in higher levels among Papuans, Aboriginal Australians, Near Oceanians, Polynesians, Fijians, Eastern Indonesians, and the Aeta (from the Philippines), but not in East Asians, western Indonesians, the Jahai (from Malaysia), or the Onge (from the Andaman Islands). This suggests Denisovan DNA may have entered the Pacific region rather than the Asian mainland. In Melanesian genomes, about 4–6% or 1.9–3.4% comes from Denisovan DNA. A 2021 study found Aeta people in the Philippines had 30–40% more Denisovan DNA than Papuans. The Aeta Magbukon in Luzon have the highest known Denisovan ancestry. In Papuans, Denisovan DNA is less common on the X chromosome than on other chromosomes, which may indicate challenges with hybrid DNA.

In contrast, mainland Asians and Native Americans have only 0.2% Denisovan DNA. A 2018 study found South Asians had similar Denisovan DNA levels to East Asians. Another study found Oceanians had the highest Denisovan DNA (about 2%), while Americans, East Asians, and South Asians had similar levels (~0.1%). The discovery of the 40,000-year-old Tianyuan Man in China, who had Denisovan DNA similar to modern East Asians, suggests Denisovan DNA was not fully diluted by later human migrations. A 2018 study of Han Chinese, Japanese, and Dai genomes showed East Asians inherited DNA from two different Denisovan groups: one similar to Denisovan DNA in Papuans and another closer to Denisovan DNA from Denisova Cave. This may indicate two separate interbreeding events. South Asians only inherited DNA from the same Denisovan group as Papuans. A 2019 study found a third wave of Denisovan DNA in East Asians.

Denisovan DNA likely entered Oceanian populations 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 happened in Wallacea, though a 7,200-year-old Toalean girl from Sulawesi, who had Denisovan DNA, suggests Sundaland could also be a possibility. Some early Sunda hunter-gatherers had little Denisovan DNA, which may mean the interbreeding event did not occur there or that later migrations diluted Denisovan ancestry.

A genetic trait in modern Tibetans, called EPAS1, helps them live at high altitudes with low oxygen. This trait likely came from Denisovans. Genes related to fat metabolism and smell are more active in people with more Denisovan DNA. Denisovan DNA may also help modern humans resist certain SARS-CoV-2 mutations.

In December 2023, scientists found that genes from Neanderthals and Denisovans may affect daily routines in modern humans.

In August 2025, a study found a Denisovan genetic marker in the MUC19 gene, which is common in many American populations and found in ancient Indigenous American remains. This marker helps produce a protein in the eyes and is linked to survival traits in modern humans. The marker is part of a 72-kb region of the MUC19 gene, which is within a larger region containing Neanderthal-specific traits. Scientists believe modern humans inherited this marker from Neanderthals, who likely got it from Denisovans through interbreeding.

A 2025 study of ancient and modern genomes across Eurasia traced how Denisovan DNA spread. It found the highest Denisovan DNA in the 40,000-year-old Tianyuan Man from northeast China, a key example of the Ancestral East Asian population. The study also examined samples from Sungir in Russia, but details are incomplete.