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Related Clues:
- Prehistoric time
- It started about 2 1/2 million years ago
- Of the Middle Ages
- Extremely outmoded
- Barney and Fred's time
- Like knight time
- It began with the Paleolithic period
- Caveman's era
- Where the wild things are?
- When the Flintstones lived
- Neolithic period
- Theater ÷ 1 = Neolithic
- Primeval
- "The Flintstones" setting
- Period in human history