Researchers have found a blue hole they say is the deepest in the world—and they’ve yet to find where it bottoms out. The formation is the Taam Ja’ Blue Hole in Mexico’s Chetumal Bay, and it has so far been measured to 1,378 feet deep, or 420 meters below sea level.
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Source : Deepest Blue Hole in the World Discovered. Scientists Still Haven’t Found the Bottom
