'Mile-deep club' of researchers sets sights on disused gold mine.
D001419:Bacteria / Q000378:metabolism; D055593:Geological Phenomena; D005844:Geology; D006046:Gold; D007753:Laboratories; D008903:Minerals / Q000378:metabolism; D008906:Mining; D055585:Physical Phenomena; D010825:Physics; D011312:Pressure; D012106:Research / Q000295:instrumentation*; D012108:Research Personnel; D013023:South Dakota; D013696:Temperature
D008903:Minerals; D006046:Gold