What are UFOs, and where do they come from? Are they extraterrestrial spacecraft visiting Earth from another star system in our galaxy, or are they from our own solar system? Are they interdimensional in nature with the ability to pop into our universe from another parallel universe? Obviously, we can’t answer any of these questions with absolute certainty, but it is possible to speculate on some of the scientific principles that might explain timely interstellar spaceflight or methods of interdimensional travel.

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"Assuming for the sake of argument that UFOs are real mechanical craft not of present human design they can only get here through Star Gate traversable wormholes allowing time travel. This would mean that Hawking's chronology protection conjecture is wrong and that it is possible to amplify the ambient anti-gravity dark energy density by many powers of ten in thin boundary layers." -- Jack Sarfatti