You can't
Edit 1: Changes pic to a more reasonable one.
Edit 2: LOL quit hating cause you can't time travel.
Edit 3: Did…recon…just…replied…^~^
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Edited by AstroSloth: 3/8/2016 2:03:37 AMAssuming that there is only one universe, it's likely that you'll end up with some sort of paradox or change the course of history. If we live in an infinitely large multiverse, then each time someone/something travels through time it could create a "branch" off of the verse that it left, creating an alternate time line where nothing will be disturbed