Last seen in:
- Wall Street Journal - Oct 10 2015 - October 10, 2015 - B & B's
- Wall Street Journal - Feb 27 2015 - February 27, 2015 - Positive Reinforcement
- Wall Street Journal - Mar 28 2014 - March 28, 2014 - Sloganeering
- Wall Street Journal - Sep 6 2013 - September 6, 2013 - Academia Nuts
- Wall Street Journal - Apr 23 2010 - April 23, 2010 - Presented in 3-D
- Universal - Jul 19 2009
- Wall Street Journal - Dec 8 2006 - December 8, 2006 - Caveat Emptor
- New York Times - Dec 1 2005
Related Clues:
- One billion years (Var.)
- Earth's age, perhaps
- Geologic procession
- Long stretch of history
- Centuries on end
- Long time, even in the singular
- Quite a span
- Nearly an eternity
- An immense time
- Eternities, seemingly
- An immense period of time
- Divisions of archaeological time
- Infinity
- Long periods of time - noes have it
- A very long time, an age