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:
- Vast expanse of time
- Geologic time unit
- 365 billion days, in astronomy
- Several eras
- It's quite a stretch
- Oodles of time
- Incredibly long time
- Proterozoic or Archeozoic, e.g.
- Period of many years
- Extremely long time
- String of periods
- ... and another
- Very, very long time
- Waiting time at the motor vehicle bureau, seemingly
- Considerable stretch