Related Clues:
- Geological time division (Var.)
- Eisenhower years, e.g.
- Geological time period (Var.)
- Swing ___
- A cause for Steinem
- Failed const. amendment
- 1 billion years
- Temporal stretch
- A billion years (Var.)
- McCarthy, for one
- 365 billion days, astronomically
- Interminable stretch
- '-- Flux' (1995 TV series)
- Almost eternity
- Longish span of time