The Russian archaeological expertise came from Vladimir Pitulko — the archaeologist who had found the Yana site in 2001 and who co-authored the study as the source of both the archaeological context and, ultimately, the specimens that yielded the critical genomes.

This convergence — Russian archaeologists who had excavated the site over many years, geneticists who could extract and sequence ancient DNA, population geneticists who could model the demographic implications of the genomic data — is characteristic of the best ancient DNA research.

The discovery was made possible by the combination of long-term archaeological fieldwork that found and preserved the specimens, technical laboratory work that extracted and sequenced the DNA, and sophisticated analytical work that interpreted what the genomic data meant in the context of human population history.

The paper reported not just the Yana genomes but a comprehensive analysis of 48 ancient human genomes from northeastern Siberia across a time range of roughly 31,000 to 600 years before present, combined with genomic data from 93 modern individuals from Alaska and western Siberia.