Denisovan Gene Variant Wrapped in Neanderthal DNA Helped Ancient Humans Reach the Americas!

A groundbreaking 2026 genetic study has uncovered a Denisovan-derived gene variant embedded within Neanderthal DNA segments that played a crucial role in enabling early human migrants to successfully colonize the Americas.

Published in Science (May 2026), the research analyzed high-coverage ancient genomes from early North and South American individuals alongside Neanderthal and Denisovan reference sequences. Researchers identified a ~50-kilobase Neanderthal-introgressed haplotype containing a Denisovan-derived regulatory variant in the EPAS1 gene region — the same locus famously linked to high-alтιтude adaptation in modern Tibetans.

This “Denisovan-in-Neanderthal” segment is present at elevated frequencies in early American genomes (dated 13,000–10,000 years ago) but is rare or absent in Eurasian populations. Functional ᴀssays show the variant enhances oxygen utilization and reduces hemoglobin levels at high alтιтudes, while also conferring metabolic advantages in cold environments — traits essential for crossing the Beringian land bridge and thriving in the harsh, high-elevation landscapes of the Americas.

Lead author Dr. Emilia Huerta-Sánchez (Brown University) explains: “This is the first clear case of a Denisovan variant riding on a Neanderthal haplotype that directly facilitated human expansion into the New World. It shows how multiple archaic admixture events created adaptive toolkits that modern humans carried across continents.”

The discovery adds a new layer to the peopling of the Americas: rather than a simple out-of-Africa journey, early migrants carried a complex mosaic of Neanderthal and Denisovan ancestry that was selectively advantageous for the final push across Beringia and into the Americas.

As more ancient American genomes are sequenced, this Denisovan-Neanderthal hybrid variant is expected to illuminate how genetic legacies from extinct cousins shaped the success of the last great human migration.