HUBS
| Date | Clue |
|---|---|
| 2025-08-10 | Transportation centers |
| 2024-07-16 | Central points |
| 2022-08-04 | Centers |
| 2020-12-30 | Nexuses |
| 2018-07-11 | O'Hare and LAX |
| 2017-11-17 | Connection points |
| 2016-11-06 | Where many connections are made |
| 2016-08-06 | Nerve centers |
| 2015-11-25 | Centers of activity |
| 2015-10-07 | Central points |
| 2015-08-09 | O'Hare and Dallas/Fort Worth |
| 2014-06-29 | LAX, O'Hare and others |
| 2014-05-27 | Centers |
| 2014-01-27 | Car parts that have caps |
| 2013-12-16 | Centers of wheels |
| 2007-11-26 | Parts of cars with caps |
| 2005-02-13 | Centers |
| 2002-11-04 | Major airports |
| 2001-08-10 | Meccas |
| 1996-11-02 | Cores |
| 1995-05-24 | Primary intersections |
| 1994-07-18 | Centers |
| 1994-04-01 | Centers of activity |