TLDR
A jaw found near Taiwan belonged to an ancient human group. Its features show these people lived across more kinds of places than the few earlier discoveries suggested.
Summary
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1 Study Aim
The study aimed to determine whether Penghu 1, a fossil jaw from Taiwan, belonged to Denisovans (an extinct human group). The authors also examined what this identification could reveal about Denisovan geography and physical traits. They tested whether ancient protein analysis (the study of preserved proteins) could identify the jaw when other evidence was limited. The study sought to identify the jaw’s owner and understand where this ancient human group lived.
2 Study Design
The researchers examined Penghu 1, a mandible (lower jawbone) from the Pleistocene (an earlier period of Earth’s history). Its age may be 10,000 to 70,000 years or 130,000 to 190,000 years. They applied ancient protein analysis and recovered 4,241 amino acid residues, which are protein building blocks. They identified two Denisovan-specific variants, meaning protein differences linked to Denisovans. These results supported identifying the specimen as male and Denisovan. The team used preserved protein evidence from one Taiwanese jaw to identify its owner.
3 Findings
The research identifies Penghu 1 as a male Denisovan. This expands the confirmed fossil distribution of Denisovans into Taiwan and shows they occupied warm, humid environments. The authors report shared robust dentognathic traits (strong jaw and tooth features) among Denisovan fossils. These traits markedly contrast with Neanderthals (an extinct group of human relatives). The findings demonstrate that Denisovans had a wider geographic range and recognizable physical features. They also show that ancient protein analysis can identify Denisovan remains beyond the few previously confirmed fossils. An ancient human group lived across a broader range of Asian environments and had notably strong jaws and teeth.