LICHEN
| Date | Clue |
|---|---|
| 2026-01-31 | Tree growth indicative of good air quality |
| 2020-02-25 | Growth on a tree |
| 2017-12-19 | What a rolling stone is unlikely to gather |
| 2017-05-14 | Reindeer moss, e.g. |
| 2014-08-24 | Rock growth |
| 2004-01-25 | Rock cruster |
| Date | Clue |
|---|---|
| 2026-01-31 | Tree growth indicative of good air quality |
| 2020-02-25 | Growth on a tree |
| 2017-12-19 | What a rolling stone is unlikely to gather |
| 2017-05-14 | Reindeer moss, e.g. |
| 2014-08-24 | Rock growth |
| 2004-01-25 | Rock cruster |