| 2026-08-23 | It can become amber |
| 2026-04-06 | Sticky tree secretion |
| 2026-03-23 | Amber or myrrh |
| 2026-02-19 | Varnish ingredient |
| 2025-07-04 | Tree goop |
| 2025-03-09 | Frankincense or myrrh |
| 2024-10-26 | Amber, e.g. |
| 2023-02-13 | Sticky secretion |
| 2023-02-09 | Sticky plant stuff |
| 2022-06-20 | Sticky tree secretion |
| 2021-11-26 | Pine product |
| 2021-08-25 | Pine secretion |
| 2020-06-12 | It sometimes runs in the woods |
| 2020-05-17 | Pourable art material |
| 2019-12-15 | What amber comes from |
| 2019-09-22 | Amber, originally |
| 2019-07-07 | What a plant may exude |
| 2019-04-25 | Myrrh, for one |
| 2018-09-08 | Balm of Gilead, e.g. |
| 2018-07-29 | Sticky stuff |
| 2018-04-25 | Amber, e.g. |
| 2017-08-31 | Material used in mummification |
| 2017-08-03 | Shellac, e.g. |
| 2017-07-23 | Frankincense, e.g. |
| 2017-07-10 | Sticky secretion |
| 2017-05-05 | Substance used in Egyptian mummification |
| 2017-01-15 | Amber, e.g. |
| 2016-12-30 | Turpentine source |
| 2016-10-29 | Pitch, e.g. |
| 2016-10-23 | Preserver of bugs |
| 2016-09-12 | Tree secretion |
| 2016-09-07 | Pine product |
| 2016-02-20 | Teflon, e.g. |
| 2015-11-24 | Pine exudation |
| 2014-11-28 | Epoxy, e.g. |
| 2014-07-17 | Frankincense or myrrh |
| 2011-08-24 | Frankincense or myrrh |
| 2011-08-15 | Source of amber |
| 2011-06-05 | Nail polish ingredient |
| 2011-01-16 | Fly catcher |
| 2010-11-08 | Pine exudation |
| 2010-09-21 | Amber is a fossilized one |
| 2010-02-02 | Sticky stuff |
| 2009-04-06 | Plant exudation |
| 2008-10-03 | Ingredient in plastics |
| 2008-08-16 | Frankincense or myrrh |
| 2008-08-14 | Balsam, e.g. |
| 2007-09-20 | Amber, e.g. |
| 2007-07-08 | Sticky stuff |
| 2005-12-26 | Varnish ingredient |
| 2005-06-15 | Amber material |
| 2005-01-12 | Varnish ingredient |
| 2004-11-21 | Balsam, e.g. |
| 2004-10-31 | Gum |
| 2004-10-25 | Pine exudation |
| 2004-10-05 | Amber or copal |
| 2004-07-04 | Pine product |
| 2003-10-13 | Sticky pine stuff |
| 2003-07-17 | Amber, e.g. |
| 2003-05-06 | Pine exudation |
| 2003-04-07 | Pine sap |
| 2002-08-04 | Myrrh, for one |
| 2002-04-07 | Pine product |
| 2001-11-10 | It runs in the woods |
| 2001-10-31 | Pine dripping |
| 2000-05-25 | Pine product |
| 2000-01-07 | Copal or mastic |
| 1999-08-10 | Plant runner? |
| 1999-07-27 | Pine product |
| 1999-06-10 | Gum |
| 1999-05-01 | Gum ___ |
| 1999-03-12 | Dragon's blood, e.g. |
| 1998-07-27 | Lacquer part |
| 1998-02-01 | Mastic, for one |
| 1997-11-23 | Gum |
| 1997-07-13 | "Jurassic Park" mosquito preserver |
| 1997-03-10 | Plant dripping |
| 1996-10-19 | Amber, e.g. |
| 1996-02-26 | Tree exudation |
| 1996-01-04 | Ancient fly catcher |
| 1995-12-11 | Plant exudation |
| 1994-09-18 | Amber, for one |
| 1994-04-24 | Plastics base |