Last seen in:
- Wall Street Journal - Oct 5 2019 - Played Out
- L.A. Times Daily - Dec 22 2017
- The Washington Post - Dec 22 2017
- The Telegraph - QUICK CROSSWORD NO: 28,222 - Sep 17 2016
- New York Times - Mar 6 2016
- New York Times - Dec 7 2014
- L.A. Times Daily - May 3 2009
- L.A. Times Daily - Jul 24 2008
- USA Today - Aug 23 2004
Related Clues:
- Extremely long stretch
- Carders' concerns
- So, so long
- Indefinitely long period
- Refines, as wine
- Geologic span
- Many months
- A billion years, in geology
- Gets grayer, usually
- A billion years, to geologists
- "Fun for children of all ___!"
- Many generations
- Mellows or yellows
- A long stretch
- Umpteen millennia