The emerging picture is of a world populated by multiple human groups that were neither fully isolated from each other nor in constant contact. They overlapped in space and time occasionally, and when they did, they sometimes produced offspring. The offspring sometimes contributed to later populations. The genetic signatures of these encounters persist today in the genomes of billions of living people.
Denisova 11 represents the most direct and specific evidence of these encounters—not a statistical signal from population genetics, but the literal genome of a first-generation hybrid. She is the most concrete individual we have who embodies what those ancient encounters actually produced.
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## The Researchers and Their Methods
The study of Denisova 11 involved a network of researchers across multiple institutions, using methods that had been developed and refined over the preceding fifteen years of ancient DNA research.
Samantha Brown’s systematic screening of the Denisova Cave bone collection using ZooMS was the starting point. Without that screening, the Denisova 11 fragment would have remained in a box, indistinguishable from thousands of other bone pieces of animal origin. The ZooMS identification—carried out with Michael Buckley’s laboratory at the University of Manchester and coordinated through Tom Higham and Katerina Douka’s project at Oxford—was what made subsequent analysis possible.
Once identified as hominin, the fragment went to the Max Planck Institute for Evolutionary Anthropology in Leipzig—Svante Pääbo’s institution and the world’s leading laboratory for ancient hominin genomics at the time. The mitochondrial DNA was sequenced first, establishing the Neanderthal maternal line. Then Viviane Slon led the nuclear genome sequencing effort.