| 2025-12-08 | Starting point |
| 2022-02-19 | Roots |
| 2021-09-26 | (0,0), in math |
| 2021-01-14 | (0,0,0) |
| 2020-09-12 | Etymology, for example |
| 2013-11-19 | Darwin's "On the ___ of Species" |
| 2012-01-22 | (0,0), on a graph |
| 2010-06-03 | Where the x and y axes meet |
| 2010-01-24 | Intersection of the x and y axes |
| 2009-03-24 | (0,0) on a graph |
| 2004-03-10 | Ancestry |
| 2003-10-06 | Where the X-axis meets the Y-axis |
| 2002-06-08 | Graph spot |
| 2002-01-17 | Wellspring |
| 2000-09-08 | Roots |
| 1999-10-06 | (0,0) on a graph |
| 1998-12-29 | Beginning |
| 1998-02-26 | Beginning |
| 1996-12-22 | Source |
| 1996-04-16 | Fountainhead |