Related Clues:
- Extra-long time period
- Heroin used regularly for a long time
- Stretch longer than an 11-Across
- Phanerozoic ___ (what we live in)
- Periods longer than eras
- Long stretches of time
- Seemingly endless amount of time
- Ages in Westgate-on-Sea
- Age of bird, not beast
- Archean and Hadean, e.g
- Long division
- Long periods of recounts, periodically
- Untold years
- Vast time spans
- Unfathomably long time periods