Could Earth Have Once Harbored a Pre-Human Industrial Civilization? Did Something Come Here Or Did Something Take The People?

Could Earth Have Once Harbored a Pre-Human Industrial Civilization? Did Something Come Here Or Did Something Take The People?

The idea of advanced prehistoric life is an intriguing one and raises a variety of interesting questions. Not least of these is this: if an industrial civilization had existed in the past, what traces would it have left?
Could Earth Have Once Harbored a Pre-Human Industrial Civilization? Did Something Come Here Or Did Something Take The People?

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