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Remembering one of two Original Star Trek series, Spock said that the past couldn't be change, Yet in the other one a science ship mate made it back to the time of WW II and the Enterprise was No longer there in there time on that planet that had a Rock WormHole.

  • Yes, changes in the past affect the future. Every Star Trek episode that deals with time travel that I can think of (from the five live-action series, at least) has dealt with this problem – Jason Baker Feb 22 '15 at 2:10

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