| 2025-08-16 | Like bismuth and bitcoin |
| 2024-07-10 | Dug up |
| 2023-01-07 | Produced, as digital currency |
| 2019-06-28 | Like much data |
| 2018-01-07 | Like the data in big data |
| 2017-04-02 | Drew useful material from |
| 2015-07-10 | See 38-Across |
| 2015-06-28 | Like some enemy waters in wartime |
| 2014-08-08 | Like 19-Across |
| 2014-05-31 | Like diamonds and gold |
| 2011-03-31 | Got out of the ground |
| 2010-07-26 | Extracted ore |
| 2008-12-23 | Dug |
| 2005-08-24 | Dug up |
| 2004-11-17 | Sought salt |
| 2004-02-09 | Dug up |
| 2000-06-10 | Got the lead out? |
| 1998-07-31 | Like enemy waters, maybe |
| 1995-06-01 | Found a vein |