In 1970, scientists drilling beneath the Mediterranean found something that should not have been there: salt formed under conditions more like a desert than a deep sea. Around six million years ago, the Mediterranean was partly cut off from the Atlantic, its water level collapsed, and vast deposits of salt formed across the basin. Then the ocean returned — perhaps in one of the largest floods in Earth’s history. This episode follows the evidence for the Messinian Salinity Crisis, the proposed Zanclean flood, and the debate over just how dry the Mediterranean really became. The crisis is certain. How far the sea fell, and how violently it came back, remain open questions. ─────────────────────────────── IN THIS EPISODE— Salt discovered beneath the deep Mediterranean— Buried river canyons cut far below modern sea level— The evidence for a catastrophic Atlantic refill— Why geologists still debate how empty the basin became SOURCESDeep Sea Drilling Project, 1970Nature, 1973Nature, 2009Scientific Reports, 2018 ─────────────────────────────── Narration in this episode is AI-assisted. Research, writing, and editorial decisions are human. Reality Is Strange — real phenomena, verified, and stranger than they should be.

When the Mediterranean Became a Desert

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