| 2026-02-11 | Seeming eternities |
| 2026-01-15 | Oodles of time |
| 2025-09-29 | Seeming eternities |
| 2025-07-23 | A seeming eternity |
| 2025-06-28 | Metaphor for a tedious tract of time |
| 2025-06-23 | Quite a long time |
| 2025-05-21 | Many ages |
| 2025-04-18 | Time on end |
| 2025-01-21 | So, so, so long |
| 2025-01-05 | Many, many moons |
| 2024-08-22 | Quite some time |
| 2024-06-22 | An eternity |
| 2024-04-30 | Ages and ages |
| 2024-01-30 | Galactic time spans |
| 2022-10-25 | Periods longer than eras |
| 2022-09-19 | Forever and a day, say |
| 2022-06-22 | Long stretches |
| 2022-06-12 | Seemingly forever |
| 2022-01-09 | Many, many, many moons |
| 2021-12-27 | Like, forever! |
| 2021-10-30 | A long, long time |
| 2021-09-07 | Seemingly forever |
| 2021-08-15 | Long runs? |
| 2021-07-09 | Millennia |
| 2020-10-18 | Long periods |
| 2020-05-27 | Many millennia |
| 2020-04-13 | Very long stretches of time |
| 2020-03-29 | Long stretches |
| 2019-12-09 | Earth's longest time divisions, geologically |
| 2019-05-10 | Long stretches |
| 2019-04-26 | Ages and ages |
| 2019-02-20 | Practically an eternity |
| 2019-01-30 | Ages and ages |
| 2019-01-28 | Many, many, many, many, many moons |
| 2018-12-14 | Countless centuries |
| 2018-12-03 | Immensely long stretches |
| 2018-11-06 | Forever and a day |
| 2018-08-08 | Ages and ages |
| 2018-07-24 | They go to great lengths |
| 2017-12-31 | Forever and ever |
| 2017-12-28 | Volcanoes develop over them |
| 2017-12-25 | Years and years and years |
| 2017-10-02 | Ages and ages |
| 2017-09-03 | Very long spans |
| 2017-01-18 | Forever and a day |
| 2017-01-01 | Immense spans |
| 2016-12-11 | Ages and ages |
| 2016-12-07 | Many, many years |
| 2016-08-30 | Stars exist over them |
| 2016-05-02 | Many millennia |
| 2016-03-27 | Huge spans |
| 2016-03-23 | Life span of a star |
| 2016-03-06 | An eternity |
| 2016-02-13 | Mountains have grown over them |
| 2016-01-19 | Time immemorial |
| 2016-01-08 | Geological units |
| 2015-11-03 | Time since the Big Bang |
| 2015-09-26 | Mountains form over them |
| 2015-09-24 | Forever |
| 2015-09-20 | Eternities |
| 2015-08-27 | Vast stretches of time |
| 2015-05-17 | A seeming eternity |
| 2015-01-25 | How long it takes mountains to form |
| 2014-12-07 | An eternity |
| 2014-09-26 | Forever, basically |
| 2014-08-12 | A seeming eternity |
| 2014-06-22 | Mountains have developed over them |
| 2014-06-17 | Ages and ages |
| 2014-06-08 | Years on end |
| 2014-05-06 | Time on end |
| 2014-04-20 | Millennia on end |
| 2014-03-15 | A lot of the time? |
| 2014-01-13 | Countless centuries |
| 2013-12-22 | Millennia on end |
| 2013-12-10 | Many ages |
| 2013-10-07 | Forever and ever |
| 2013-04-30 | Immense time spans |
| 2012-05-15 | Just about forever |
| 2012-05-01 | Ages and ages |
| 2012-04-28 | Time to evolve? |
| 2012-03-07 | Time immemorial |
| 2011-11-03 | Ages upon ages |
| 2011-10-16 | A very long time |
| 2011-04-23 | Time immemorial |
| 2011-02-27 | For-EV-er |
| 2010-08-23 | Ages and ages |
| 2010-08-15 | Time on end |
| 2010-07-11 | Ages upon ages |
| 2010-04-26 | Many millennia |
| 2009-12-30 | Seemingly forever |
| 2009-11-15 | Ages and ages |
| 2009-02-19 | A seeming eternity |
| 2008-12-01 | Long times |
| 2008-10-07 | How long it takes canyons to form |
| 2008-09-10 | Billions of years |
| 2008-08-21 | Stretches of history |
| 2008-07-02 | Seemingly forever |
| 2008-03-03 | Years and years and years |
| 2007-10-28 | Ages and ages |
| 2007-08-30 | Eternities |
| 2007-07-08 | Time immemorial |
| 2007-01-28 | Major stretches |
| 2006-12-24 | A long, long time |
| 2006-11-12 | Lengthy time units |
| 2006-06-12 | Geologic periods |
| 2006-04-24 | Awfully long time |
| 2006-04-20 | An extremely long time |
| 2006-03-18 | Great times |
| 2006-02-27 | Ages and ages |
| 2006-02-09 | Time immemorial |
| 2005-12-22 | Forever and a day |
| 2005-12-04 | Long periods |
| 2005-10-15 | Time immemorial |
| 2005-03-06 | Time on end |
| 2005-02-21 | Millions of years |
| 2004-10-31 | Many ages |
| 2004-07-28 | Ages and ages |
| 2004-04-05 | Ages and ages |
| 2004-03-28 | Long stretches |
| 2003-09-28 | Seeming eternity |
| 2003-08-15 | A dog's age |
| 2002-12-05 | Seemingly forever |
| 2002-08-29 | An eternity, seemingly |
| 2002-06-17 | Almost forever |
| 2002-05-12 | Time on end |
| 2002-04-29 | Millions of years |
| 2002-03-15 | Almost forever |
| 2002-01-02 | Years and years |
| 2001-11-15 | Spans of history |
| 2001-10-16 | Years and years |
| 2001-10-05 | Years on end |
| 2001-08-30 | Almost forever |
| 2000-05-22 | Almost forever |
| 2000-04-14 | A long time to wait |
| 1999-11-17 | A lo-o-ong time |
| 1999-10-17 | Ages and ages |
| 1999-08-29 | Astronomical figures |
| 1999-08-12 | Time and time again |
| 1999-07-09 | Astronomical periods |
| 1999-06-19 | Stretch of history |
| 1999-04-19 | Ages and ages |
| 1999-02-25 | Years on end |
| 1999-01-17 | Many ages |
| 1998-09-21 | Incalculable amount of time |
| 1998-09-07 | Seemingly forever |
| 1998-07-16 | Almost forever |
| 1998-03-07 | A dog's age |
| 1998-02-23 | Geologic periods |
| 1997-12-08 | Billions of years |
| 1997-09-15 | Years and years |
| 1997-08-18 | Many millennia |
| 1997-04-06 | A lot of time |
| 1996-09-25 | Ages and ages |
| 1996-07-28 | Years on end |
| 1996-02-15 | Seemingly forever |
| 1995-12-26 | Geologic time divisions |
| 1995-12-19 | Ages and ages |
| 1995-11-25 | Eternity |
| 1995-11-01 | Ages and ages |
| 1994-03-28 | Long, long time |
| 1994-01-25 | Geologists' times |
| 1994-01-13 | Many millennia |