| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Fri Aug 20, 2021 | 12D | Question of humanity that has never been answered | Randolph Ross | Shortz |
| Fri Aug 11, 2017 | 15A | What many stargazers wonder | Hal Moore | Shortz |
| Fri Mar 10, 2017 | 65A | A question of cosmology | Pawel Fludzinski | Shortz |
| Mon Oct 7, 2013 | 2D | "Can anybody hear us?" | Amy Johnson | Shortz |
| Fri Sep 28, 2012 | 16A | What cosmologists wonder | Ed Sessa | Shortz |
| Sat Feb 25, 2012 | 64A | Spy's query at the start of a meeting | Barry C. Silk | Shortz |
| Sat May 22, 2010 | 16A | Exobiologist's query | Will Nediger | Shortz |
| Sat Oct 25, 2008 | 54A | Conspirator's cautious conversation starter | Karen M. Tracey | Shortz |
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