Using Google Earth and aircraft reconnaissance, archaeologists identify
more than 100 previously unknown sites.

© NATIONAL MUSEUM OF SERBIA
Bronze Age people built massive enclosures on the Pannonian Plain, leaving behind artifacts such as this clay chariot discovered in a cremation urn 1 century ago.
More than 3000 years ago during the Bronze Age, people across Eurasia formed massive trade networks that tied the continent together. But the Pannonian Plain, an open expanse that today includes parts of Romania, Hungary, and Serbia, was considered a relative hinterland. That was true even after
archaeologists 2 decades ago uncovered a handful of massive Bronze Age enclosures, some protected by walls and ditches many kilometers long.
No one was sure how the structures were tied to cultural developments elsewhere in Europe, although scattered finds of bronze artifacts showed the enclosures weren't completely isolated. "They were seen as unicorns on the landscape," says Barry Molloy, an archaeologist at University College Dublin. "This was thought of as a backwater."
In 2015, Molloy and other archaeologists turned to satellite imagery to see whether they could spot more structures that ground-based investigations had missed. Last week in PLOS ONE, they report finding
more than 100 of these distinct enclosures in what is today Serbia. Spaced closely together, they form a belt stretching 150 kilometers along the Tisza River, a major north-south artery dividing the Pannonian Plain.
The findings suggest the structures were part of a vast network of settlements that took part in a booming, continentwide bronze trade that flowered some 3600 years ago.
"For the first time we can see the extent of this phenomenon," says Austrian Archaeological Institute archaeologist Mario Gavranovic, who was not part of the new study. "The remote sensing approach is great."
The structures, many identified for the first time, have been hiding in plain sight. Many are invisible from the ground because they were plowed nearly flat after decades of intensive agriculture or destroyed in prehistoric times. After identifying the enclosures in Google Earth photos, Molloy and his team flew over the area in a small airplane, then visited as many of the sites as possible by foot. "We spent a lot of time trudging through mud," Molloy says.
Comment: This is notable in light of Mary Settegast's research and theories on Plato's history of Atlantis, and prehistoric warfare.
For further insight into what was occurring on the planet at the time, in Volcanoes, Earthquakes And The 3,600 Year Comet Cycle, Pierre Lescaudron writes: See also: