Fossilized proteins from 200,000-year-old skulls in China reveal they belong to Denisovians, solving a long-standing mystery of ancient human populations.
Ancient human remains identified as Denisovians
Fossilized proteins from skulls found in China, dating back nearly 200,000 years, have revealed that the remains belong to Denisovians, a previously mysterious human population. These findings were made possible through a proteomic analysis that identified a specific genetic mutation linked to Denisovians.Key mutation confirms Denisovan identity
Researchers identified a mutation called COL1A2-996 R>K in the proteins of the Xujiayao skulls. This mutation is a known marker of Denisovians and helped confirm the identity of the remains, resolving a long-standing debate about their classification.Denisovan features blend old and modern traits
The reconstructed face of the Denisovan from Xujiayao combines traits of both Homo erectus and modern humans. It has a low, flat skull, a receding forehead, and a massive brow ridge, similar to Homo erectus, but also features like an arched temporal squama, which are more typical of modern humans.Muddle in the Middle clarified
The discovery helps clarify the "Muddle in the Middle," a term used to describe the confusion in classifying human fossils from the Middle Pleistocene in East Asia. These findings suggest that several previously unclassified Chinese fossils belong to the same Denisovan population.New light on Homo juluensis
The proposed species Homo juluensis, based on fossils from Xujiayao and other sites, is now seen as part of the Denisovan lineage. This could significantly change the understanding of human evolution in Asia by linking these fossils to a single population.Evolutionary transitions observed
Some Denisovan fossils, like those from Hualongdong, show traits that suggest a transitional form between Denisovians and modern humans. These findings highlight the dynamic nature of human evolution and the interconnectedness of different human lineages.
