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The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]
The deepest blue hole in the world is the Taam Ja' Blue Hole in Chetumal Bay, which was found to have a depth of more than 420 metres (1,380 ft) in 2024. [ 3 ] The second deepest is the Dragon Hole , or Longdong, in the South China Sea at 300.89 metres (987 ft) deep, [ 4 ] while the third deepest blue hole in the world is Dean's Blue Hole at ...
Dragon Hole, also known as Yongle Blue Hole (Traditional chinese:永樂藍洞) after the third Ming emperor, Yongle, was the deepest known blue hole in the world at 300.89 metres (987.2 ft) deep [1] until it was discovered that the Taam Ja' surpassed it in 2024. [2]
Called Dean’s Blue Hole (named after a Bahamian fisherman), this impressive marine formation, located in a protected bay west of Clarence Town, is the third-deepest blue hole in the world ...
In 2012, scientists exploring blue holes in the Bahamas discovered bacteria deep in the caves where no other life existed, potentially filling the knowledge “gap” on what types of lifeforms ...
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The Great Blue Hole is near the center of the photograph. The Great Blue Hole is a large marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ft) deep.
This hard-to-find rusty cap in the ruins of a building in Russia's Kola Peninsula covers the deepest hole on earth. The scientists drilled it off and on for 24 years from 1970 to 1994. They got ...