Can someone explain this science plot hole to me?
If they found a "fracture" in time, and can only travel back to that specific time, and can't travel back -- how do they even know that the people going through the gate aren't just being vaporized?
Doesn't the knowledge that someone actually time traveled need a traveler to return to the present to report that they actually went back 85 million years?
I realize I said "actually" a lot.
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