DELVE
| Date | Clue |
|---|---|
| 2023-04-01 | Go (into) |
| 2022-02-17 | Dig (into) |
| 2021-09-04 | Burrow (into) |
| 2021-07-27 | Dig (into) |
| 2020-10-01 | Go deep |
| 2020-05-18 | Go deeply (into) |
| 2019-09-28 | Look (into) |
| 2017-10-25 | Dig deeply |
| 2010-09-20 | Look (into) |
| 2007-07-29 | Go (into) |
| 2006-04-13 | Dig |
| 2005-10-18 | Probe, with "into" |
| 2004-10-08 | Dig |
| 2004-04-06 | Dig (into) |
| 2002-01-17 | Look closely |
| 2001-11-28 | Dig deeply |
| 2001-11-03 | Look closely |
| 2001-03-14 | Dig (into) |
| 1999-02-11 | Search (into) |
| 1998-12-03 | Probe (into) |
| 1998-02-16 | Search (into) |
| 1996-08-16 | Look (into) |