Also the wikipedia page: https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole Linked the news article b/

Also the wikipedia page: https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole Linked the news article b/c has some good graphics and vids not on wikipedia.