Krzysztof Starnawski Discovers World’s Deepest Underwater Cave
Polish diver Krzysztof Starnawski has spent two decades exploring Hranická Propast, a submerged cave in the eastern Czech Republic, to learn just how far the rabbit hole goes. Starnawski was fascinated by the cave's unusual creation story — it formed from the bottom up, as acidic mineral water ate its way up through the soft limestone — and hypothesized it was much deeper than anticipated. After a series of diving expeditions, aided and abetted by an underwater avalanche that, in 2015, widened a narrow opening at what had been previously believed to be the bottom, Starnawski was able to map out a route for an ROV (remotely operated underwater vehicle) to descend. On September 27, 2016, technicians dropped the ROV in, confirming a depth of 404 meters, or 1,325 feet, besting the previous record (Pozzo del Merro in Italy) by 39 feet.
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