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Chinese scientists believe they have discovered the deepest "blue hole" on the planet.
"Dragon Hole," in the Paracel Islands—which are disputed islands claimed by China, Taiwan and Vietnam—is reported to be 987 feet deep, according to Chin's state-run news agency Xinhua. The blue hole—a giant pit in the sea that is known for its distinctive blue color—previously thought to be the deepest is Dean's Blue Hole in the Bahamas. Dragon Hole is more than 300 feet deeper than Dean's Blue Hole.