People lived at the Yana Rhinoceros Horn Site (northeastern Siberia) about 32,000 years ago, showing that humans could survive far north during the Ice Age. This helps set the stage for later movements across Beringia, the region that connected Siberia and Alaska when sea levels were lower.
Upper Paleolithic groups lived near Lake Baikal in south-central Siberia during the Last Glacial Maximum period, leaving rich archaeological remains (art, tools, and burials). These sites matter because they later became key sources of ancient DNA used to model how Native American ancestry formed.
Demographic modeling using ancient genomes supports gene flow from ANE-related populations into the ancestors of all Native Americans roughly 25,000–20,000 years ago. This mixing helps explain why Native American ancestry is not simply a subset of East Asian ancestry.
A juvenile individual from Mal’ta (often labeled MA-1) lived about 24,000 years ago. Later DNA work showed MA-1 represents an “Ancient North Eurasian” (ANE)–related lineage, which is important because ANE ancestry is now recognized as part of the deep ancestry of Native Americans.
Genome-based models suggest that a distinct group later called “Ancient Beringians” split from the ancestors of other Native Americans roughly 22,000–18,100 years ago. This branching supports the idea of long-term population structure in Beringia rather than a single, quick movement into the Americas.
Modeling in the Upward Sun River genome study inferred a split between the main “Northern” and “Southern” Native American branches around 17,500–14,600 years ago. This timing is often discussed alongside the retreat of Ice Age barriers, because it implies diversification before or during the earliest spread south of the ice sheets.
A major mtDNA (maternal lineage) study argued that the ancestors of Native Americans likely spent a long period isolated in Beringia before expanding into the Americas. This “standstill” idea became a central framework for connecting genetics with Ice Age geography and migration routes.
Genomic results reported by Raghavan and colleagues showed MA-1 was closer to western Eurasians than to East Asians, yet also shared genetic affinity with Native Americans. The study estimated that a substantial fraction of Native American ancestry could be explained by gene flow from a MA-1–related population, reshaping “single-source” migration models.
The genome of Anzick-1, an infant buried with Clovis artifacts in Montana, helped show that early Native Americans were closely related to present-day Indigenous peoples of the Americas. The analysis also showed that gene flow from a Mal’ta-related population into Native American ancestors occurred before about 12,600 years ago.
An infant genome (USR1) from the Upward Sun River site in Alaska, dated to about 11,500 years ago, represented a previously unknown branch of Native Americans termed “Ancient Beringians.” This provided direct genetic evidence that multiple Native American lineages existed in or near Beringia soon after the last Ice Age transition.
A large 2019 ancient-DNA study traced population history in northeastern Siberia from the Pleistocene onward, including links among early Siberian groups and later peoples. This work strengthened the evidence that ANE-related ancestry persisted and mixed in different ways across northern Eurasia, helping explain the upstream sources feeding Beringian and Native American ancestries.
Genomic data from ancient individuals across Siberia and the North American Arctic showed that later Holocene migrations added new ancestry layers, including ancestry associated with Palaeo-Eskimo-related sources. This matters for “peopling models” because it distinguishes the older ANE + East Asian–derived founding ancestry from later Arctic movements that shaped some northern populations and language families.
Ancient Siberian genomes (Mal'ta–Buret' and related) and their contribution to New World population models (c. 24,000–8,000 BP)