Clue: Billion-year span
We have 1 possible answer for the clue Billion-year span which appears 4 times in our database.
Possible Answers:
Related Clues:
- Unimaginably long time
- Long time division
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- Span longer than an era
- Exceedingly long time
- Long time span
- Long time, geologically
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- Long geological stretch
- A billion years, to Hubble
- Dog's age
- Eternity, seemingly
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- A month of Sundays
- Prolonged period