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Dating the earliest known human presence in Europe
Artefacts from an archaeological site in Ukraine estimated to be around 1.4 million years old represent the earliest securely dated evidence for hominin presence in Europe. The findings, reported in Nature this week, shed light on the arrival of the first humans into Europe and the direction of their travel.
Hominins are thought to have arrived in Eurasia between two and one million years ago, but precise dating has been challenging owing to the scarcity of archaeological sites of that age (part of the Palaeolithic period). The archaeological site of Korolevo in western Ukraine has yielded Palaeolithic tools since the 1970s and is among the most northern of early Palaeolithic sites, yet no one has been able to date it precisely.
Roman Garba and colleagues use a dating method based on the decay of cosmogenic nuclides to determine the precise age of sediments in which Korolevo artefacts, such as stone tools, were buried. They estimate that the tools may be around 1.4 million years old. The authors also studied habitat suitability over the past 2 million years and suggest that early hominins probably exploited warmer interglacial periods to colonize higher latitude sites, such as Korolevo. Korolevo occupies a key space geographically between the Caucasus and southwestern Europe, which are known to have been occupied by hominins around 1.8 million and 1.2 million years ago, respectively. The dating puts Korolevo in the middle temporally as well as spatially, providing support for a long held but previously unsubstantiated hypothesis that Europe was colonized from east to west, the authors conclude.