Overview

• In 2011, sonar detected 1,417 circular formations, each 20 meters wide, at a depth of 120 meters near Cap Corse in the Mediterranean Sea.
• Laurent Ballesta’s team conducted a three-year expedition (2021–2024) using innovative high-pressure habitat technology to explore and analyze the rings.
• The team confirmed the geological origins of these formations while documenting their unique ecosystems and potential as climate archives.
• The Arte documentary 'Cap Corse – Le mystère des anneaux,' airing May 3, 2025, showcases the research, challenges, and groundbreaking methods used in the study.
• The documentary remains available on Arte.tv until August 2027, while further scientific research continues on the site’s ecological and climatic significance.