Life › Human evolution › The genus Homo
Denisovans
c. 200,000–30,000 years ago? (DNA, a few bones; Harbin skull 2025)· Organism or group· Human ancestors & us
Strong evidenceGood evidence; dates or details still being refined.
An extinct human group, sister to Neanderthals, first identified in 2010 from DNA in a finger bone from a Siberian cave.
See it on the Life map →What happened
A girl's finger bone from Denisova Cave in Siberia's Altai Mountains held DNA unlike any known human: the first human group discovered mainly through genetics. Fossils remain scarce: teeth, a jaw from the Tibetan Plateau (identified 2019), another from Taiwan (2025) and, also in 2025, the Harbin skull from northeastern China, at least 146,000 years old, identified by proteins and DNA. Their DNA survives in people today, most in Papua New Guinea, Australia and the Philippines.
Why it matters
They reveal a branch of the human family that bones alone would never have shown, and a Denisovan gene variant helps Tibetans live at high altitude.
The evidence (fossils, genes, rocks)
Ancient DNA from bones and cave sediments; ancient proteins from jaws and the Harbin skull; and Denisovan DNA segments in living Asians, Papuans and Aboriginal Australians.
Still debated
Whether they should take the name Homo longi, given to the Harbin skull in 2021; how many Denisovan populations existed; and when the last ones died out.
Connections (3)
▸Homo heidelbergensis may be ancestral to DenisovansDebated
The connection
Denisovans are the Neanderthals' sister group, sharing an ancestor that split from our line hundreds of thousands of years ago. If heidelbergensis-like populations spread across Eurasia, an eastern branch may have become Denisovans while a western branch became Neanderthals.
When and how
Eurasia, after about 500,000 years ago; Denisovans are known from Siberia, Tibet, Taiwan and northeastern China.
How sure are we?
Genetic family trees show the Neanderthal–Denisovan split, estimated at roughly 400,000–450,000 years ago. Linking it to heidelbergensis fossils is inference, not direct evidence.
Debates and open questions
Some Chinese fossils, such as Dali and Jinniushan, may be Denisovans or related forms. Whether 'heidelbergensis' is a useful ancestor label at all is debated.
▸Denisovans also took part in Interbreeding with Neanderthals & DenisovansWell established
The connection
Denisovans, known mostly from DNA, also mixed with modern humans spreading through Asia. Papuans, Aboriginal Australians and some Filipino groups carry the most Denisovan DNA, a few percent, while East and South Asians carry traces. The DNA suggests several distinct Denisovan populations were involved. A Denisovan version of the EPAS1 gene helps Tibetans cope with thin air.
When and how
Across Asia and island Southeast Asia, roughly 50,000–30,000 years ago (estimates vary); first detected in 2010 from a finger bone in Denisova Cave, Siberia.
The evidence
The Denisovan genome (2010, high quality 2012) compared with modern populations; distinct patterns of DNA segments point to at least two or three Denisovan sources.
Debates and open questions
Where the mixing happened, given how few Denisovan fossils exist, and whether Denisovans themselves crossed the sea gaps of the Wallace Line toward New Guinea.
▸Svante Pääbo identified from DNA DenisovansWell established
The connection
A finger bone from Denisova Cave in Siberia was too small to identify by shape. Pääbo's team extracted its DNA and found a lineage unlike modern humans or Neanderthals. A nuclear genome later in 2010 showed it was a sister group of Neanderthals, now called Denisovans, whose DNA survives in some living people.
When and how
Bone excavated in 2008 by Russian archaeologists; DNA work at the Max Planck Institute in Leipzig, led by Johannes Krause and Pääbo, published in Nature in March and December 2010.
The evidence
A high-quality genome followed in 2012, and Denisovan DNA has since been found in teeth and cave sediments, and ancient proteins have identified Denisovan fossils from Tibet and China.
Debates and open questions
How many Denisovan groups existed and what they looked like; the 2025 Harbin skull identification is helping, as the Denisovans entry describes.