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  2. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    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]

  3. The Superdeep - Wikipedia

    en.wikipedia.org/wiki/The_Superdeep

    She receives a call from the colonel telling her that they will leave shortly for the Kola borehole. Sounds of an unknown origin were recorded deep beneath the surface and shortly after 20 people went missing. The bore hole is not only as the public believes it, but also a deep underground research lab. Anna is tasked with retrieving samples.

  4. Man dives into underwater sinkhole in stunning, terrifying video

    www.aol.com/news/2016-02-23-man-dives-into...

    At up to 115 feet wide and 663 feet deep, Dean's Blue Hole is the world's deepest blue ... The film was originally made in 2010 but has has been ... See more incredible sinkhole photos:

  5. Boesmansgat - Wikipedia

    en.wikipedia.org/wiki/Boesmansgat

    Boesmansgat (or Bushmansgat), also known in English as "Bushman's Hole", is a deep submerged freshwater cave (or sinkhole) in the Northern Cape province of South Africa, which has been dived to a depth of 282.6 metres (927 ft). Boesmansgat was believed to have first been explored by amateur diver Mike Rathbourne, in 1977.

  6. What's inside the world's deepest hole?

    www.aol.com/news/whats-inside-worlds-deepest...

    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 ...

  7. ‘Blue hole’ is largest ever discovered at 1.3K feet deep ...

    www.aol.com/blue-hole-largest-ever-discovered...

    Indeed, while TBJH was initially discovered in 2021, scientists only measured its depth down to 900 feet due to limitations in the echo-sounder technology — which calculates speed based on sound ...

  8. Hollow Earth - Wikipedia

    en.wikipedia.org/wiki/Hollow_Earth

    Drilling holes does not provide direct evidence against the hypothesis. The deepest hole drilled to date is the Kola Superdeep Borehole, [60] with a true vertical drill-depth of around 12 km (7.5 mi). However, the distance to the center of the Earth is nearly 6,400 km (4,000 mi). [61]

  9. Groundbreaking full color-images revealing deepest glimpse ...

    www.aol.com/nasa-reveals-stunning-1st-full...

    The "deep field" image gleans a look at a point in space 4.6 billion light-years away from Earth. This means that the light captu Groundbreaking full color-images revealing deepest glimpse into ...