New Denisovan finds from a Chinese cave give clearer clues to appearance, tools and diet

# What was found and why it matters Researchers working at Bianfu Cave in Yunnan province, southwestern China, have identified multiple Denisovan remains and associated artifacts. The discoveries include four teeth, two skull fragments, part of an arm bone and about 60,000 fragments of animal bone. Radiometric and contextual dating places one skull fragment between about 167,000 and 161,000 years old and the other skull fragment, the arm bone and teeth between about 142,000 and 134,000 years old.

# How the remains were identified The research teams could not recover ancient DNA because the cave's age and relatively warm environment prevented DNA preservation. Instead, they used a distinctive amino-acid marker preserved in tooth enamel to assign the human remains to Denisovans. That molecular signature made it possible to link these fossils to Denisovans without DNA and to compare their teeth to other archaic hominin finds.

# Anatomy and appearance: what the bones suggest The arm bone is the most informative element about Denisovan build. Its shape appears more similar to modern human limb bones than to the more robust limbs typical of Neanderthals. From this, researchers infer that Denisovans may have had limb proportions and skeletal gracility closer to modern humans than to Neanderthals. The teeth and skull fragments expand the comparative dataset for Denisovan dental morphology, allowing researchers to reassess other ambiguous hominin fossils in Asia.

# Tools, food and behavior at Bianfu Cave Excavations recovered simple stone and bone tools alongside the hominin remains. The large assemblage of animal bone fragments—roughly 60,000 pieces—documents subsistence behavior: deer and wild bovids, including water buffalo and gaur, were major prey animals. The combination of tools and butchered animal remains positions Bianfu Cave as one of the richest Denisovan sites yet discovered and gives direct evidence of hunting and processing practices.

# Geographic and historical context

# Implications for human evolutionary history The Bianfu Cave finds add morphological, proteomic and archaeological data that can help attribute other fragmentary Asian fossils to Denisovans. Because Denisovan genetic signatures persist in modern populations of Southeast Asia and Oceania but are limited elsewhere, placing more fossils in geographic and temporal context will help clarify how Denisovans, Neanderthals and modern humans interacted and exchanged genes across Asia.

# What remains uncertain

# Bottom line Bianfu Cave provides multiple lines of evidence—teeth and skull fragments identified via enamel proteins, the first recognized Denisovan arm bone at the site, stone and bone tools, and a massive faunal assemblage—that together improve understanding of Denisovan anatomy, diet and regional presence between roughly 167,000 and 134,000 years ago.