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:
- Incalculable amounts of time
- Stellar periods
- Long, long periods
- Quite a long time
- It's longer than an era
- Big time division
- How long it takes canyons to form
- Span of epoch proportions?
- G permits them all
- Ages and ages and ages
- Extensive period
- Immeasurable time
- Billion-year time period
- Gets old
- One billion years, geologically