AREOLE
| Date | Clue |
|---|---|
| 2020-06-21 | Cactus bump |
| 2017-04-08 | Round bump on a cactus |
| 2015-12-15 | Iris part |
| 2015-07-10 | Round bump on a cactus |
| 2014-12-30 | Iris ring |
| 2014-07-03 | Anatomical ring |
| 2013-12-01 | Biological ring |
| 2012-10-28 | Anatomical ring |
| 2009-03-01 | Ring of color |
| 2009-02-15 | Space on a butterfly's wing |
| 2008-07-25 | Prickly area of a prickly pear |
| 2008-01-19 | Small cavity, as around a cactus spine |
| 2007-09-29 | Ring of anatomy |
| 2005-06-04 | Iris part |
| 2005-02-06 | Anatomical interstice |
| 2004-09-25 | Cactus ring |
| 2001-12-02 | Small interstice |
| 2001-05-19 | Iris ring |
| 2000-07-16 | Ring of color |
| 1999-07-27 | Botanical interstice |
| 1997-01-30 | Small pit |
| 1996-10-03 | Anatomical ring |
| 1995-09-10 | Botanical space |
| 1995-08-06 | Biological ring |
| 1995-04-09 | Anatomical ring |
| 1995-01-16 | Interstice |
| 1994-11-15 | Interstice in a leaf |
| 1993-11-26 | Tissue gap |