Clue: About 1/5th of Earth's existence
We have 1 answer for the clue About 1/5th of Earth's existence. See the results below.
Possible Answers:
Related Clues:
- Long time
 - Phanerozoic, for instance
 - Waiting period, seemingly
 - Long, long time
 - One billion years, in geology
 - Quite a while
 - Age
 - Forever, or close to it
 - Lots of time
 - Interminable time
 
Last Seen In:
- Washington Post - August 19, 2001
 
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