Scientists have recovered the first-ever Denisovan forearm bone from Bianfu Cave in southwest China’s Yunnan Province, according to a study published in the journal Nature by researchers from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences. The radius bone dates back to a period between 134,000 and 167,000 years ago, offering new physical evidence about how these extinct human relatives lived and adapted to Asian environments.
Discovering the First Denisovan Forearm Bone in Yunnan Province
Researchers identified the rare radius bone among more than 60,000 bone fragments collected at Bianfu Cave, a Paleolithic site in southwest China. Denisovans were initially identified in 2010 through DNA extracted from a tiny finger bone found in a Siberian cave. Since that discovery, physical remains have remained extremely scarce, mostly limited to teeth and a few skull fragments across Asia.
To process the massive volume of material from Bianfu Cave without prohibitive costs and delays, the research team employed a two-step sorting method. Scientists first categorized the bone fragments by shape before applying a protein-analysis technique to confirm which pieces originated from ancient humans. This workflow successfully isolated three Denisovan specimens from two different stratigraphic layers, uncovering two skull fragments alongside the historic forearm bone.
Unique Physical Traits and Movement Patterns of Denisovans
The newly analyzed radius bone displays a distinct combination of anatomical characteristics that separates Denisovans from both Neanderthals and modern humans. While the bone features a large upper joint similar to Neanderthal arm bones, its overall shape and the geometry of its neck region align more closely with modern humans.
“This combination of traits suggests that Denisovans probably had unique movement patterns and behaviors that set them apart from both Neanderthals and our own species,” said Fu Qiaomei, a professor from the IVPP, describing the significance of the morphology in the published research.
Did you know? Before the Bianfu Cave excavation, the only rich source of Denisovan fossils with clear stratigraphic context and associated stone tools recovered outside Siberia was located on the Qinghai-Xizang Plateau. The Yunnan discovery fills a major geographical gap in the fossil record.
How Ancient Populations Survived Harsh Climates in Southern China
The fossils confirm that Bianfu Cave supported a thriving Denisovan population during a particularly cold phase in Earth’s history. According to Fu, the relatively warm climate of the Yunnan-Guizhou Plateau during this period, coupled with abundant food sources, created a secure habitat that allowed these ancient groups to persist for millennia.
This regional stability likely provided a long-term refuge, helping Denisovans navigate severe climatic shifts across the Asian continent. Each newly identified fossil contributes essential anatomical data toward understanding how these hominins adapted to diverse environments.
Frequently Asked Questions
What is a Denisovan?
Denisovans are an extinct group of early human relatives first identified in 2010 through DNA extracted from a Siberian cave specimen.
Where was the new Denisovan forearm bone found?
According to researchers from the IVPP, the radius bone was discovered at Bianfu Cave in China’s Yunnan Province.
How old are the newly discovered Denisovan fossils?
The fossils recovered from Bianfu Cave date back to a period between 134,000 and 167,000 years ago.
Explore More: Want to stay updated on the latest archaeological discoveries and human evolution research? Subscribe to our newsletter or explore our archives for more in-depth reporting on ancient human history.
Keep reading