Since their discovery in 2010, Denisovans had been a genomic ghost to scientists: known only from a few tiny bone fragments found in Denisova Cave (Altai, Russia) and a mandible from the Tibetan Plateau, they had no face. A study published in Cell in 2025 changes everything: the Harbin skull, known as "Dragon Man," may be a DenisovanDenisovanAn extinct human population, cousin of the Neanderthals, identified in 2010 from the DNA of remains in Denisova Cave (Siberia).→ -- and it is spectacular.

Altai landscape in Russia
The Altai landscape in southern Siberia. It is in this region, at Denisova Cave, that the first Denisovan remains were uncovered in 2008-2010. The region sheltered Denisovans, Neanderthals, and Homo sapiensHomo sapiensThe present-day human species, which emerged in Africa around 300,000 years ago, the only surviving human lineage after the extinction of Neanderthals and Denisovans.→ at different periods.

The Harbin skull was discovered in 1933 in Heilongjiang Province (northeastern China) and secretly preserved for decades before being handed over to scientists in 2018. Its morphology is astonishing: it is one of the largest homininHomininMember of the subtribe Hominina, comprising the human lineage (Homo, Australopithecus, Paranthropus…) but excluding orangutans and gibbons. The term progressively replaces "hominid" in its narrow sense.→ skulls ever discovered, with oversized rectangular orbital sockets, a wide face projected forward, and a cranial capacity equivalent to that of modern humans.[1]

Confirmation Through Proteomics and Phylogeny

Previous studies had suggested that "Dragon Man" belonged to a new species, Homo longi. The 2025 study by Chen Fahu and colleagues provides more direct evidence: proteomic analysis of dental enamel proteins and molecular phylogeny place the Harbin skull within the Denisovan group, alongside the Xiahe mandible already attributed to this lineage.

Altai Mountains
The Altai Mountains, a convergence point of several human lineages during the Middle and Upper PleistocenePleistoceneThe geological epoch of the great ice ages (c. 2.6 Ma–11,700 BP), spanning most of human prehistory.→. Denisova Cave, nestled in these mountains, has yielded remains of at least three types of hominins: Denisovans, Neanderthals, and their hybrids.

This attribution is decisive because it resolves a puzzle with two unknowns: on one side, Denisovans known from their DNA but without a body; on the other, an imposing skull without molecular identity. Proteomics -- less sensitive to degradation than DNA in subtropical humid environments -- allowed the connection to be made where classical genetics had failed.

The Face of the Denisovans

The Harbin skull sketches for the first time the features of this mysterious lineage. Denisovans were not gracile: their massive skull, prominent brow ridges, and large orbits suggest a robust individual adapted to varied and cold environments. But their cranial capacity is in no way inferior to that of modern humans, and may even surpass it.

Dali skull, China
The Dali skull (Shaanxi, China, approximately 200,000-260,000 years old), another archaicArchaicRefers to an ancient, now-extinct human population or form (Neanderthals, Denisovans, ghost lineages), as opposed to anatomically modern humans.→ hominin from East Asia. Some researchers consider that it too might belong to the Denisovan lineage or a related population, illustrating human diversity in Asia during the Middle Pleistocene.

The geographical distribution then takes on a very different dimension: Denisovans were not limited to the Altai. Their genes persist in current populations of Southeast Asia and Oceania, and the Harbin skull extends their documented presence to northeastern China approximately 146,000 years ago. This species occupied an immense portion of Asia for hundreds of millennia -- and its morphology, now partially revealed, makes it one of the major players in human history in the East.