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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]
Dean's Blue Hole is a blue hole located in The Bahamas in a bay west of Clarence Town on Long Island and is the world's third deepest with a depth of 202 metres (663 ft), after the Taam Ja' Blue Hole in the Chetumal Bay and the Dragon Hole in the South China Sea. [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 ...
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 ...
As the race in space was winding down, soviet scientists turned inwards. You'd never guess that this is the site of one of their great achievements. This hard-to-find rusty cap in the ruins of a ...
The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m 2. This material has been dissolved and carried away by the river.
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Its name means deep water in the Mayan language and, at over 420 metres (1,380 ft) deep, it is the deepest known blue hole. [1] Blue holes generate a distinctive blue color when seen from above and are typically only a few dozen meters deep. It was discovered in about 2003 by a local diver who followed a grouper that went into its mouth. The ...