The first Europeans reached Ukraine 1.4 million years ago, new study finds

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The first Europeans reached Ukraine 1.4 million years ago, new study finds

During warm periods in Earth’s history, known as

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, glaciers the size of continents pulled back to reveal new landscapes. These were new worlds for early humans to explore and exploit, and 1.4 million years ago this was Europe: a

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unoccupied by humans.

Long before it emerged as the epicenter of global colonialism, Europe was itself colonized for the first time by humans migrating from the east.

A new study, led by a team from the Czech Academy of Sciences and Aarhus University and

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, reports the earliest human presence in Europe, at a site on the Tysa River in western Ukraine known as

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.

******* stone tools at Korolevo, Ukraine

We studied a layer of stone tools left on a river bed by the people who crafted them. These “core-and-flake” tools were made in the

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, the most primitive form of tool-making, first classified by the palaeoanthropologist

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in east *******. Similar tools have also been found at the oldest known sites of human occupation in Europe, the Levant, and Asia.

The tools at Korolevo had been ******* by river sediment and later by wind-blown dust, and then eventually uncovered by workers at a stone quarry. Evidence of prehistoric people at this site was first discovered in 1974 by the Ukrainian archaeologist, V. N. Gladilin.

Early efforts to date the tools proved troublesome. Measurements of

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in the overlying sediments indicated that the lowermost tools predate the most recent reversal in the Earth’s magnetic field 0.8 million years ago, an event known as the

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. This timing is well beyond the limits of commonly used dating methods, such as radiocarbon (useful back to about 50 thousand years) and luminescence dating (usually limited to the last 300 thousand years or so).

A dating method based on cosmic rays

To solve this problem, we applied an innovative dating method using

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that can reach back 5 million years, the critical timeframe for human evolution. This method has already yielded definitive ages at other key sites, such as the 3.4 million year old

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in southern *******, and the 0.77 million year old Zhoukoudian ***** erectus, also known as

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It works like this: exploding stars (

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) outside our solar system release streams of cosmic rays that enter Earth’s upper atmosphere, sending showers of secondary cosmic rays down to Earth, where they react with minerals in rocks and soils to produce radioactive nuclides in tiny but measurable quantities.

We measured two such nuclides,

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, to calculate the burial age. A date was obtained by observing the ratio of these two nuclides, which changes over time during burial due to their differing radioactive decay half-lives: 1.4-million-years for beryllium-10 and 0.7-million-years for aluminum-26.

By applying this approach to the sediment layer containing the stone tools at Korolevo, we were able to calculate a burial age of 1.5 to 1.3 million years (the

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), making this Europe’s earliest securely dated human occupation.

Left panel: Supernova in galaxy NGC 2525, about 70 million light years away. Earth is continuously bombarded by cosmic rays generated by supernovae like this one. Right panel: the team of physicists (co-authors) at the Helmholtz Zentrum Dresden-Rossendorf and their accelerator mass spectrometer, the machine that measured the beryllium-10 and aluminium-26 in our samples. Credit: NASA and STSI/HZDR

Who lived at Korolevo?

The absence of fossils at Korolevo means we cannot definitively say who these pioneers were. However, the tools are too old and too primitive to be the work of either anatomically modern humans (***** sapiens), or

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. The tool makers were likely some variety of

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, a remarkably successful ancestor of humans that appeared around 2 million years ago, and spread across diverse habitats in *******, Asia, and Europe.

On their journey from ******* into Eurasia, early humans passed through the Levant region, where they left signs of occupation as early as 2.5 million years ago at

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. Further north, numerous ***** erectus fossils have been found at

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in the Caucasus Mountains, dating to 1.8 million years ago.

Europe colonized from the east

Once into Eurasia, people migrated eastward at a remarkable pace, reaching as far as the island of

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, southeast Asia, by around the same time we find them in western Ukraine. It is not known what caused the delayed westward incursion into Europe, but it appears that Korolevo bridges the migration gap between the Caucasus (1.8 million years ago) and sites in southwestern Europe dated to 1.2 to 1.1 million years at

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and Vallonnet. One proposal is that people entered Europe from the east via the Danube Valley and Pannonian Plain.

What they found was very different to the present day. 1.4 million years ago, Europe was home to

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such as the mammoth, hippopotamus, giant species of hyena, cheetah, *******, saber-toothed cat, scimitar-toothed cat, and the ********* jaguar—among others that have

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.

Interglacial warmth posed opportunities

Korolevo is the northernmost known presence of whom we assume to be ***** erectus. Our burial age of around 1.4 million years ago corresponds to three interglacial periods that were among the warmest of the last few million years. We propose that people exploited these warm intervals to disperse into higher latitudes.

The intervening glacial periods in this region were bitterly cold, ruling out any possibility of a

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for humans. We reason that climate was a major influence on human behavior back then, just as it is today.

Europe’s origin story

Our discovery in Ukraine adds a new and unexpected layer to the story of Europe. Differing opinions on the meaning of these ancient tools will no doubt arise, not least because their discovery in such a contested location brings questions of human history directly into the geopolitical ******* line.

And yet an alternative view also exists. It is one that marvels at human enterprise and reminds of the common ground from which all humanity sprang: a salve for transcending these

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More information:
R. Garba et al, East-to-west human dispersal into Europe 1.4 million years ago, Nature (2024).

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Provided by
The Conversation

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Citation:
The first Europeans reached Ukraine 1.4 million years ago, new study finds (2024, March 10)
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