Related Clues:
- Long long time
- Billion-year period
- A bazillion jillion years
- With 64-Across, 2005 Charlize Theron title role
- Lo-o-ng time (Var.)
- Indefinable time period
- Era upon era
- Largest geological division
- Indefinable time
- Vast time frame
- Stretch of time
- It goes on and on and on
- Immeasurably long period of time
- Lengthy stretch
- Billion years