Denisovan Jawbone Found in Taiwan Strait Reveals Wider Range & Adaptability
- A jawbone recovered from the seabed of the Taiwan Strait has been definitively identified as belonging to a Denisovan, a long-enigmatic group of archaic humans.
- Until recently, Denisovan remains were largely confined to sites like Siberia’s Denisova Cave and parts of the Tibetan Plateau.
- Denisovans were first identified in 2010, initially through DNA extracted from a finger bone found in Denisova Cave.
A jawbone recovered from the seabed of the Taiwan Strait has been definitively identified as belonging to a Denisovan, a long-enigmatic group of archaic humans. The fossil, retrieved from depths of 60 to 120 meters, provides compelling evidence that Denisovans, previously believed to have inhabited primarily colder, mountainous regions, also thrived in the warmer climates of Asia.
Until recently, Denisovan remains were largely confined to sites like Siberia’s Denisova Cave and parts of the Tibetan Plateau. This new discovery, however, suggests a far broader geographical range for these ancient hominins.
A Surprising Location for an Ancient Human Species
Denisovans were first identified in 2010, initially through DNA extracted from a finger bone found in Denisova Cave. For years, understanding of their distribution relied heavily on genetic traces found in modern populations. The discovery of the jawbone off Taiwan dramatically alters that picture, demonstrating their adaptability to diverse environments.
Researchers note that the location where the fossil was found, approximately 25 kilometers off the coast of Taiwan, was once part of the Asian mainland during the Pleistocene era, before rising sea levels submerged the area. The climate at that time was significantly warmer and more humid than the cold, dry conditions typically associated with known Denisovan habitats.
New Techniques Illuminate Ancient Fossils
The identification of this particular fossil is notable for the methodology employed. Traditional DNA analysis, often challenging with ancient specimens, proved insufficient. Instead, scientists utilized a technique called paleoproteomics, which analyzes proteins found in ancient bones and teeth. This innovative approach allowed them to confirm the species of the fossil even in the absence of viable DNA.
The study, published in Science, details the extraction of over 4,000 amino acid residues from the fossil’s tooth enamel. Two of these residues were identified as unique to Denisovans, providing conclusive evidence of the jawbone’s origin. As Dr. Frido Welker, one of the study’s authors, explained, this breakthrough offers a powerful new tool for identifying ancient hominins.
“What I think is exciting in this particular study is that we have studied the dental enamel of the teeth as well, and from that, we can deduce that this individual is a male individual.”
Denisovans Were More Adaptable Than We Thought
The jawbone underscores the remarkable adaptability of Denisovans. Their ability to survive in such varied environments suggests a highly flexible species, capable of thriving in both frigid and tropical climates. Dr. Welker emphasized that the geographical spread of Denisovan remains points to their resilience.
“When we think about the environments and climates, we have the Altai Mountains, the Tibetan plateau and vastly warmer and more humid environment that was present in the Taiwan Strait, which at the time was mainland East Asia,” he noted. “This signals a huge ability to adapt to very different environmental conditions, and survive in all those places.”
The fossil exhibits robust mandibular features and large teeth, characteristics likely advantageous in challenging environments. However, researchers caution that further evidence is needed to determine whether these traits are representative of the species as a whole or specific to male Denisovans.
“That’s something we’ll need more fossil evidence to confirm,” Dr. Welker said.
The discovery also builds on recent findings in 2025, including the identification of Denisovan remains in Laos and the confirmation of a Denisovan cranium as research indicated.
Denisovan Research: What to Expect in the Coming Years
While attempts to directly date the fossil using uranium techniques were unsuccessful, researchers estimate its age to be between and years. This uncertainty does not diminish the significance of the find. Dr. Welker believes that the combination of paleoproteomics and genetic analysis will ultimately refine our understanding of when and where Denisovans roamed.
“With paleoproteomics and genetic methods, I hope that in the future we can better pinpoint where and when that happened.”
Looking ahead, this discovery is expected to spur further research into Denisovans, their interactions with Neanderthals and Homo sapiens, and the factors that ultimately led to their extinction. The identification of this fossil provides a crucial piece of the puzzle, reshaping our understanding of human prehistory and the complex story of our origins.