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Igor's avatar

There is a lot of evidence that we are not the first advanced civilization on Earth.

Various legends put us as the 4th .. and various groups have vested interest in keeping the past hidden, so it is hard to say for sure who built what and when and what caused destruction of previous civilizations .. Is this a cyclical human (civilization) self-destruction event? or: Is this a natural cylical event that repeats every 12k years or so?

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NTMI's avatar

Great choice for a topic, it is forgotten way too often in all the discussions today.

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