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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. Bertha Rogers Borehole - Wikipedia

   en.wikipedia.org/wiki/Bertha_Rogers_Borehole

   The Bertha Rogers Borehole is a former natural gas well in Burns Flat, Dill City, Oklahoma, US.Today plugged and abandoned, it was originally drilled by the Lone Star Producing Company as its oil-exploratory hole number 1–27 between October 25, 1972 and April 13, 1974, reaching a then world record terminal depth of 31,441 feet (5.9547 mi; 9,583 m).

4. Category:Deepest boreholes - Wikipedia

   en.wikipedia.org/wiki/Category:Deepest_boreholes

   the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes (Extended Reach Drilling, for oil production).

5. 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 ...

6. Outer Banks town begs tourists to stop digging ‘extremely ...

   www.aol.com/outer-banks-town-begs-tourists...

   The warning was issued not long after video shared by the OBX Locals Facebook page showed a man standing in a neck-deep hole while continuing to dig with a shovel. The group has more than 22,000 ...

7. Scientists obtain deepest rock sample from Earth's mantle - AOL

   www.aol.com/news/scientists-obtain-deepest-rock...

   Scientists using an ocean drilling vessel have dug the deepest hole ever in rock from Earth's mantle - penetrating 4,160 feet (1,268 meters) below the Atlantic seabed - and obtained a large sample ...

8. Borehole - Wikipedia

   en.wikipedia.org/wiki/Borehole

   Especially in developing countries many boreholes are stull dug by hand. The digging begins with manual labor using basic tools such as shovels, picks, and crowbars. Workers excavate the soil layer by layer, often using a circular motion to create a well-shaped hole. The process is slow and demanding, requiring teamwork and coordination.

9. This massive underwater hole in the Bahamas is believed to ...

   www.aol.com/news/2016-08-16-this-massive...

   Dean's Blue Hole, an underwater cavern, in the Bahamas may be popular with tourists and freedivers, but, according to a 60 Minutes report, many locals believe it was "dug by the devil.". Such ...