v21’s avatarv21’s Twitter Archive—№ 73,709

  1. this is a picture of the top of the deepest hole humans have ever dug. it goes over 12 kilometers into the ground. they stopped drilling it when it got so hot the rock started getting squishy.
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    1. …in reply to @v21
      Kola Superdeep Borehole en.wikipedia.org/wiki/Kola_Superdeep_Borehole
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