the drill passed 39,000 ft and drilling stopped for about a year to celebrate https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole … Russia: 1 day party; 364 day hangover
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the drill passed 39,000 ft and drilling stopped for about a year to celebrate https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole … Russia: 1 day party; 364 day hangover