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'Opens up New Prospects': Ancient Underwater Wall Discovered Off French Coast; Hints at Coastal Societies

Summary by One News Page
A colossal 7,000-year-old granite wall, France's largest underwater construction, has been unearthed off Brittany's coast. This 120-meter structure, found with smaller man-made elements, offers profound insights into early coastal societies and their ingenious adaptations to rising sea levels. ...

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Despite storms and currents well preserved: French researchers have come across a granite structure off the Breton coast that surprises them.

·Germany
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In front of the Breton coast, researchers have discovered an impressive wall in the middle of the sea. The tons of stone blocks are considered unique and could fundamentally change the understanding of coastal cultures in the past.

·Dortmund, Germany
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© Research and knowledge / KI Stone wall in the Atlantic Ocean in front of the Île de Sein lies 9 m deep, dates point to 5800 to 5300 BC and leave purpose questions open.

Archaeologists described the 120-metre wall as the largest underwater construction discovered in France, and either a trap or a dam was used to protect against sea level rise.

·United Arab Emirates
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Welt broke the news in Dortmund, Germany on Saturday, December 13, 2025.
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