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Are humans Earth's first truly advanced civilization?
The idea that an advanced civilization existed on Earth long before humans is fascinating, but scientists aren't convinced.
Proposed NASA Administrator Jared Isaacman, who has already piloted dual orbital missions aboard SpaceX Dragon capsules, predicts millions of spacefarers will lift off as independent spaceflight ...
The idea that an advanced civilization existed on Earth long before humans is fascinating, but scientists aren't convinced.
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