Last seen in:
Related Clues:
- Historic blocks of time
- Stats that are better when they're low
- Meaningful stretches
- Sections of a natural history museum, maybe
- So long!
- A kazillion years, it seems
- History book sections, say
- Geologists' periods
- Paleozoic and Edwardian, e.g
- Long periods of history
- Presidential terms, perhaps
- Fashion periods
- Tremendous spans
- Meaningful stretches of history
- Time-line slices