Provenance
Interbreeding between Neanderthals and modern humans was strongly sex biased
Alexander Platt, Daniel Harris & Sarah Tishkoff
Science, 26 February 2026, Pages 922-925
Abstract:
Sex biases in admixture and other demographic processes are recurrent features throughout human evolution. For admixture between Neanderthals and anatomically modern humans (AMHs), sex bias has been proposed as an explanation for the relative lack of Neanderthal ancestry in modern human X chromosomes compared with that in modern human autosomes. By observing a 62% relative excess of AMH ancestry in Neanderthal X chromosomes, we characterized the interbreeding between the two groups as predominantly male Neanderthals with female AMHs. Analytic and numerical modeling presents mate preference as a more parsimonious cause of the sex bias than purely demographic processes with differential patterns of male and female migration.
Genomes of the Golden Horde elites and their implications for the rulers of the Mongol Empire
Ayken Askapuli et al.
Proceedings of the National Academy of Sciences, 24 February 2026
Abstract:
The Golden Horde, the northwestern extension of the Mongol Empire ruled by Genghis Khan’s descendants, holds a pivotal place in the history of Central Eurasia and Eastern Europe. Consequently, understanding the genetic legacy of Genghis Khan and his lineage has long been of both academic and public interest, especially concerning the hypothesized association of his Y-chromosome with haplogroup C3*. Here, we present ancient DNA data from four archaeological individuals — three males and one female — from medieval elite mausoleums of the Golden Horde in the Ulitau region of Kazakstan. Our genomic analyses reveal that the three male individuals are paternally related and share the Y-chromosome haplogroup C3*, confirming the association between the Y-chromosome haplogroup C3* and the Mongol Empire, supporting the long-standing hypothesis about the genetic legacy of Mongols. Additionally, our findings demonstrate that the Golden Horde elites primarily derive their genomes from Ancient Northeast Asians (ANA), with an additional ancestral component from either Ancient North Eurasians (ANE) or a Berel Scythian related population, e.g., the Kipchaks. Archaeological evidence, in turn, sheds light on a medieval population undergoing religious and cultural transition, offering insights into the societal changes experienced by Mongolian conquerors. Furthermore, through constructing an Identity by Descent (IBD) network, we successfully identify medieval relatives of these individuals on the Mongolian Plateau, linking genetic data to broader population dynamics. In essence, this study provides ancient DNA evidence that advances our understanding of the genetic background of the Mongolian elites and the population dynamics in Central Eurasia.
Spatiotemporal patterns of existence and extinction for woolly mammoth in Siberia in the last 50,000 years
Yaroslav Kuzmin, Nikolai Dobretsov & Viktoria Lyamina
Radiocarbon, forthcoming
Abstract:
A database of ca. 970 radiocarbon dates on bones, teeth, and tusks of the woolly mammoth (Mammuthus primigenius Blum.) from Siberia was created in order to understand the spatiotemporal distribution of this species over the last 50,000 14C years (BP). Mammoths populated all parts of Siberia until ca. 12,000 BP. After that, a few refugia existed south of ca. 60°N at ca. 10,600–12,000 BP, and in the northern part of mainland Siberia mammoths survived until ca. 9700 BP. At ca. 9500–3700 BP, they existed only in today’s insular regions such as the New Siberian Islands and Wrangel Island in the High Arctic. The relationship between the dynamics of mammoth populations and climatic fluctuations is complicated. In the warmer intervals (interstadials), the number of mammoths in Siberia was generally slightly larger than in the colder times (stadials); however, the difference is often not significant. The connection between the dynamics of mammoth populations and climatic fluctuations in Siberia is therefore complicated and non-linear.
Climate-driven reduction in biomass production of the Eurasian steppe coincides with nomadic migration during the first millennium CE
Feng Chen et al.
Proceedings of the National Academy of Sciences, 24 February 2026
Abstract:
Although it is generally accepted today that climate and other environmental factors affected past human societies at different spatiotemporal scales, direct linkages are difficult to determine, and correlation should not be confused with causation. Here, we use a tree-ring width network of multimillennial chronologies from inner Eurasia to reconstruct annual changes in Net Primary Productivity (NPP) back to 200 BCE. Our findings reveal that episodes of reduced NPP around the 70s–100s, 360s–380s, and 470s–560s CE likely contributed to the westward and southward migration of nomadic people from their homelands in northwestern China and Mongolia. Although prolonged multidecadal periods of climate-induced low NPP served as tipping points for agricultural and pastoral subsistence systems, the inherent mobility of nomadic communities not only enabled them to adapt to adverse environmental conditions but also facilitated a widespread dispersal of ethnic groups.
Multidisciplinary analyses and ancient DNA reveal social inequality and mobility in the Central Plains during the Eastern Zhou period in China
Baoshuai Zhang et al.
Nature Human Behaviour, forthcoming
Abstract:
The Eastern Zhou period (771–221 BC), characterized by social stratification, was marked by important inequality. Here the authors analyse 32 skeletons from Songzhuang Cemetery in Henan Province using sex-specific peptides, ancient DNA and isotopes to explore multidimensional inequality in sexes, diet and mobility. DNA and proteomic analyses show that young women were marginalized as sacrificial victims (22 out of 26 human sacrifices were female). Carbon and nitrogen isotopic analyses suggest dietary differences by social class, with the nobility consuming more high-protein and millet-based diets than sacrificial companions, who themselves show intra-group dietary variation (δ13Cbone,nobles = −8.6‰; δ13Cbone,human sacrifice group one = −10.9‰; δ13Cbone,human sacrifice group two = −14.1‰; δ15Nbone,nobles = 11.6‰; δ15Nbone,human sacrifice group one = 8.5‰; δ15Nbone,human sacrifice group two = 7.7‰). Enamel and dentin isotope data indicate that these dietary inequalities were established from childhood (δ13Cenamel,nobles = −1.5‰; δ13Cenamel,human sacrifice group one = −3.8‰; δ13Cenamel,human sacrifice group two = −6.9‰). Strontium and oxygen isotope evidence shows that a high proportion of the nobles were non-local migrants. Genetic analysis reveals a genealogy linking four noblewomen to a sacrificial victim, highlighting the importance of kinship and marital alliances in maintaining social status. Despite class rigidity, dental isotope sequences in M18 reveal that two individuals experienced childhood dietary shifts, indicating rare class mobility.