AI Insight
Researchers have recovered ancient proteins from Homo erectus teeth found in China, revealing protein variants that appear in both Denisovans and modern humans. This finding suggests that a shared molecular heritage, sometimes called a "ghost" lineage, connects these hominin groups across deep evolutionary time. The protein data provide a biological link between Homo erectus and later archaic and modern human populations, supplementing the genetic record where ancient DNA often cannot be preserved.
Why it matters
This research extends our ability to trace human evolutionary relationships beyond the reach of ancient DNA, using proteomics as a tool for reconstructing deep hominin history. It may reshape understanding of how archaic human groups are connected and which ancestral populations contributed to the biology of people alive today.
Understand the Science
Ancient Homo erectus teeth from China yield protein variants seen in Denisovans—and us
Source: Ghost of long-extinct ancestor lives on in people today