| 2025-11-07 | A long, long time |
| 2025-08-03 | Seemingly forever |
| 2025-02-07 | A long, long time |
| 2024-02-21 | Long, long times |
| 2023-11-19 | Untold millennia |
| 2023-11-06 | Ages |
| 2022-09-03 | Time immemorial |
| 2022-05-11 | Practically forever |
| 2021-01-31 | Units in the life span of a galaxy |
| 2018-11-11 | Almost forever |
| 2017-11-26 | Big stretches |
| 2016-05-29 | A while, in hyperbole |
| 2015-12-31 | Bajillions of years |
| 2014-09-25 | Millions of millennia |
| 2014-08-01 | Time immemorial |
| 2012-07-05 | Almost an eternity |
| 2010-05-19 | Time on end |
| 2009-04-07 | The time it takes mountains to rise |
| 2008-06-11 | Almost an eternity |
| 2007-08-17 | Time immemorial |
| 2007-04-15 | Long stretches |
| 2007-02-18 | Near eternity |
| 2005-08-03 | Ages and ages |
| 2003-12-08 | Ages and ages |
| 2003-11-13 | Untold centuries |
| 2002-01-04 | Ages |
| 2001-04-08 | Ages and ages |
| 2000-08-29 | Ages and ages |
| 2000-03-29 | Almost an eternity |
| 2000-02-13 | Time without end |
| 2000-01-12 | How long it takes mountains to form |
| 1999-09-02 | Forever, seemingly |
| 1999-02-21 | Seemingly forever |
| 1997-12-24 | Long times |
| 1997-09-13 | Long time |
| 1995-07-11 | Years and years |