The idea that we aren’t the first advanced civilization to live on Earth sounds like a fringe theory, but it raises a good question: How can we be so sure that a civilization didn’t arise and die on Earth so long ago that any trace of it has been erased?
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Information
- Show
- Channel
- FrequencyUpdated twice weekly
- Published16 May 2024 at 09:00 UTC
- Length49 min
- RatingClean