Europe's Oldest Human-Made 'Megastructure' Discovered under Baltic Sea
Archaeologists have discovered what may be Europe’s oldest human-made megastructure, submerged below the Baltic Sea and dubbed the Blinkerwall
![Europe's Oldest Human-Made 'Megastructure' Discovered under Baltic Sea](https://static.scientificamerican.com/sciam/cache/file/688A3D0F-F2E9-4EF5-A102A0BBC68E9711_source.jpg?#)
Archaeologists have discovered what may be Europe’s oldest human-made megastructure, submerged below the Baltic Sea and dubbed the Blinkerwall
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