PHYLA
| Date | Clue |
|---|---|
| 2020-12-13 | Parts of kingdoms |
| 2016-10-06 | They're found within kingdoms |
| 2015-05-03 | Parts of a kingdom |
| 2014-08-22 | Parts of kingdoms |
| 2012-03-09 | Parts of kingdoms |
| 2004-04-20 | Kingdom divisions, in biology |
| 2002-09-08 | Taxonomic subdivisions |
| 1997-08-11 | Taxonomic divisions |