Thirty-seven metres below the surface, its entrance drowned by rising seas since the end of the last glacial maximumLast Glacial MaximumThe peak of the last glaciation (c. 26,000 to 19,000 years ago), with ice sheets at their greatest extent; it pushed populations towards southern refuges.→, Cosquer cave has guarded its secrets for nearly 27,000 years. Discovered by diver Henri Cosquer in 1985 and officially reported to authorities in 1991, this subaquatic cavity near Marseille holds one of the world's most spectacular assemblages of cave art: horses, aurochs, great auks and negative handprints that bear witness to a humanity deeply rooted in the marine environment. This BL World View documentary, directed by V. Perazio with photography by Luc Vanrell, dives into this maritime prehistoryPrehistoryThe span of human history before the invention of writing, from the Palaeolithic to the Metal Ages, known mainly through material remains.→ to probe the profoundly coastal origins of Homo sapiensHomo sapiensThe present-day human species, which emerged in AfricaAfricaThe cradle of humankind: the continent where the first hominins appeared, then Homo sapiens around 300,000 years ago, before the expansion to the rest of the world.→ around 300,000 years ago, the only surviving human lineage after the extinction of NeanderthalsNeanderthalsA fossil humanity of Eurasia, robust and cold-adapted, extinct around 40,000 years before present.→ and Denisovans.→Homo sapiens.
Cosquer cave is unique in the history of prehistoric archaeology: a Palaeolithic sanctuary accessible only by scuba diving through a 175-metre flooded passage. When Henri Cosquer first explored that dark corridor alone in 1985, virtually the entire cave was in fact dry, suspended well above sea level in an aerial cavity. It was only after the site was reported, and following the tragic deaths of three divers who entered the passage without adequate equipment in 1991, that authorities became aware of the extraordinary heritage hidden beneath the waters of the Gulf of Marseille.
A Museum Painted Beneath the Sea
The artists who frequented Cosquer cave between 27,000 and 19,000 years ago had no inkling their sanctuary would one day be submerged. They painted and engraved a fauna of remarkable diversity for PalaeolithicPalaeolithicThe oldest and longest period of prehistory (c. 3.3 Ma–12,000 BC), defined by chipped stone tools and a hunter-gatherer way of life.→ art: alongside the expected mammoths, horses and ibex, the walls show figures of great auks (Pinguinus impennis, now extinct), seals, jellyfish and fish. No other Palaeolithic art cave offers such a window onto coastal and marine life in the Upper PleistocenePleistoceneThe geological epoch of the great ice ages (c. 2.6 Ma–11,700 BP), spanning most of human prehistory.→.
The documentary follows the divers and researchers who continue to study this unique site. Each dive is a race against time: the inexorable rise in sea level threatens the lowest paintings, and condensation from repeated dives accelerates the deterioration of the cave walls. In 2022, a life-size replica opened in Marseille under the name Cosquer Mediterranee, allowing the public to explore this treasure without endangering the original.
The Lady of Cavillon and Her Shells
To place Cosquer cave in a broader context, the documentary evokes the Lady of Cavillon, a GravettianGravettianAn Upper Palaeolithic culture (c. 33,000–21,000 BC) spanning from the Atlantic to Siberia, famous for its ivory female figurines ("Venuses") and, at Dolní Věstonice, the oldest fired ceramics.→ burialBurialThe intentional deposition of a body, sometimes with offerings; a marker of symbolic behaviour.→ discovered in the Grotte des Enfants (Italy) in the nineteenth century. This woman, buried around 23,000 years ago, wore an elaborate adornment of pierced shells, bearing witness to a deep connection between Palaeolithic populations and the marine environment. The Nassa neritea shells found with her remains came from the Mediterranean and attest to either long-distance exchange networks or the significant mobility of human groups along the coastline.
This observation opens onto one of the film's central questions: to what extent did marine resources play a fundamental role in the cognitive and cultural evolution of Homo sapiensHomo sapiensThe present-day human species, which emerged in Africa around 300,000 years ago, the only surviving human lineage after the extinction of Neanderthals and Denisovans.→Homo sapiens? The omega-3 fatty acids abundant in seafood, cephalopods and oily fish are now recognised as essential for neurological development. Some palaeoanthropologists suggest that regular access to coastal resources may have supported the development of a more complex brain in certain Upper Palaeolithic populations.
Whales, Seals and Primitive Navigation
The documentary also explores a little-known dimension of coastal prehistory: the exploitation of marine mammals. Evidence of whale use -- including beached animals and possibly active hunting or driving -- has been identified at several European and Asian Upper Palaeolithic sites. At some contemporary Atlantic sites in Spain, sealSealA small engraved object (often steatite) used to stamp a mark in clay; the Indus seals, bearing animals and signs, attest to administration and trade, though their script remains undeciphered.→ remains and cetacean bones have been found in consumption contexts, suggesting that coastal populations drew a significant portion of their diet from the sea.
The question of primitive navigation is one of the film's most fascinating threads. How did Cosquer's artists depict marine animals that would have been difficult to observe from the shore with such precision? The hypothesis of light watercraft -- makeshift rafts, dugout canoes or hide boats -- remains debated. Yet some evidence, such as the presence of Homo sapiens in Australia as early as 65,000 years ago, demonstrates that our ancestors were crossing significant stretches of open water long before Cosquer cave was decorated. The Mediterranean may not have been a boundary for them, but a territory.
An Endangered Heritage, a Replica Preserved
The documentary's final chapter addresses conservation challenges. Cosquer cave now faces a dual threat: sea-level rise linked to climateClimateThe long-term average atmospheric conditions of a region; its variations (glaciations, aridifications) shaped migrations, agriculture and the collapse of prehistoric societies.→ change, which could flood the last air-filled spaces within decades, and physico-chemical deterioration accelerated by human visits. Since Cosquer Mediterranee opened in Marseille, dives in the original cave have been drastically restricted. But the race against time is on: each year, paint fragments detach and engraved surfaces erode under the action of salt water.
Beyond Cosquer itself, this documentary poses a fundamental question: how many other Upper Palaeolithic coastal sites lie today beneath the rising seas? The Mediterranean, the Atlantic, the North Sea -- all these shorelines were above water and inhabited during the cold phases of the Pleistocene. A systematic programme of underwater archaeology remains to be built if we are to recover these submerged archives of human history.
No comments yet. Be the first.