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Two-Million-Year-Old Environmental DNA and the Lost Ecosystem of Northern Greenland
In late 2022, an international paleogenomics consortium reported the recovery of environmental DNA dating back approximately two million years from the Kap København Formation in Peary Land, northern Greenland. Prior to this investigation, the oldest authenticated genomic sequences derived from a million-year-old Siberian mammoth tooth, leading many evolutionary biologists to believe that DNA could not survive beyond that temporal threshold. By analyzing microscopic fragments of ancient nucleic acids preserved within clay and quartz sediment layers, the researchers managed to reconstruct an entire Early Pleistocene biological community that flourished during an era when regional temperatures were ten to seventeen degrees Celsius warmer than today.
The breakthrough depended on advances in high-throughput sequencing technology and the recognition of mineral-binding preservation mechanisms. Free DNA degrades rapidly in