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A new DNA study of ancient burials has revealed significant population mixing in Europe following the collapse of the Western Roman Empire, according to reports cited by Reuters.
Researchers analyzed the genomes of 258 individuals buried in southern Germany, mainly in Bavaria and Hesse, dating between 450 and 620 AD, including sites such as Altheim. The findings suggest a sharp demographic shift that coincided with the breakdown of Roman administrative control after the fall of the Western Roman Empire in 476 AD.
The study, published in Nature, indicates that once imperial restrictions on movement and marriage disappeared, intermixing between local Roman populations and migrants from northern Europe increased rapidly. Researchers also found that smaller groups and individuals, rather than large unified “barbarian invasions,” were responsible for migration patterns during this period.
Scientists concluded that by the 7th century, these processes contributed to the formation of new genetic profiles typical of early medieval Central European populations, reflecting gradual integration rather than abrupt replacement.
The research also provides insight into social structures of the time, showing widespread monogamous families influenced by Christian norms, high child mortality, and relatively short average lifespans of around 40–43 years.
