| 2026-04-04 | Epoch that marked the rise of mammals |
| 2022-05-06 | Big epoch for mammals |
| 2022-02-13 | Epoch when palm trees grew in Alaska |
| 2020-02-15 | Epoch when modern mammals arose |
| 2018-11-16 | Period of great climate change |
| 2017-09-27 | Epoch characterized by the rise of mammals |
| 2016-02-23 | Epoch when modern mammals arose |
| 2015-10-24 | Epoch when horses first appeared |
| 2013-03-25 | Epoch when mammals arose |
| 2012-05-15 | Epoch when mammals arose |
| 2011-01-21 | Epoch when bats first appeared |
| 2010-10-31 | Epoch in which mammals arose |
| 2007-06-15 | Dawn-of-mammals epoch |
| 2006-06-25 | Epoch 50 million years ago |
| 2004-10-20 | Epoch of the Tertiary period |
| 2004-05-25 | Epoch of 50 million years ago |
| 2003-08-27 | Epoch when mammals arose |
| 2000-08-19 | Occurring 40 to 55 million years ago |
| 1999-12-19 | Epoch in which mammals became dominant |
| 1998-11-13 | Tertiary Period part |
| 1996-06-22 | Epoch in which mammals arose |
| 1996-04-07 | Epoch in the Cenozoic Era |
| 1995-12-24 | Tertiary Period epoch |