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It's very interesting! If you haven't heard of what I think is called the Time Paradox of Progression (I may be wrong), you should definitely look it up, if this stuff interests you. It's about how past civilizations were sometimes much more advanced than we are but by using whole different techniques. Just because we're the most current civilization doesn't mean we're the most advanced ever to walk the Earth!

AGREE! there are still numerous mysteries!

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