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British diver finds longest underground river in world

A British diver and his German partner have discovered what they say is the world's largest submerged cave system and underground river under Mexico's Yucatán Peninsula.

According to the Guardian, Stephen Bogaerts and Robbie Schmittner spent four years exploring the Sac Actun system before they made the final connection that revealed a single system that is 95 miles long. "The two divers entered the system separately on January 23 and worked their way through huge chambers and tiny tunnels to meet up at the connection point they had always believed they would find."

The natural hydraulic system sustained Mayan civilisation for centuries and is the main source of fresh water for the tourism industry. Stephen Bogaerts hopes that realizing how interconnected the underground system is will help to protect it from contamination.