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The rights holder only offers this film free in the UK.
Cap Corse: The Mystery of the Rings
20241h 32m
Strange circular forms are spotted a hundred metres down off the coast of Corsica, and a scientific team led by diver Laurent Ballesta sets out to learn what they are. This Arte documentary follows the investigation into whether the rings might be a living organism.
Hosted on YouTube by ARTE.tv Documentary
Watch on YouTube Last checked 14 Nov 2026
