Related Clues:
- A billion years, in astronomy (Var.)
- Geologic time span
- Huge time span
- Long division?
- Vast stretch
- Forever, seemingly (var.)
- Plenty of time?
- '___ Flux' (1990s MTV series)
- ___ Flux (Charlize Theron role)
- Many, many centuries
- Nearly forever
- Long geologic time division
- Nearly infinite perioD
- Part of the earth's history
- '___ Flux' (futuristic MTV cartoon)