Last seen in:
- L.A. Times Daily - May 27 2022
- The Washington Post - May 27 2022
- Wall Street Journal - Apr 7 2020 - Sporting Chance
- Wall Street Journal - Nov 14 2018 - Double Meanings
- USA Today - Feb 17 2018
- USA Today - Nov 27 2017
- New York Times - Jul 5 2015
- Wall Street Journal - Jun 27 2014 - June 27, 2014 - Colorful Language
- Boston Globe - Jun 26 2011
- New York Times - Nov 28 2006
Related Clues:
- One billion years, in astronomy
- Group of eras
- Series of periods
- Vast time period
- Geologic division
- Longest division of geological time
- Forever, figuratively
- Time measured in ages
- Geologist's division
- Astronomical unit
- Countless centuries
- Awfully long time
- Geologic period
- Unbelievably long time
- Mighty long time: Var.