Cusp (lemmy.world)
submitted 10 months ago by to c/comicstrips@lemmy.world
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[–] 68 points 10 months ago (14 children)

That this doesn't happen is proof that we never invent time travel.

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  • [–] 22 points 10 months ago (6 children)

    I like the idea that time machines can only transport people within the time machines own timeline. You can go back in time and see yourself finish the time machine but you can't go back one second before that.

    Like it's one end of wormhole that gets anchored at a particular point in time and the other end drifts forward through time, you can enter and exit the wormhole at any point in its worldline but only within that limit

    It's still allows for time travel, and explains why no one has ever met a time traveller.

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  • [–] 8 points 10 months ago (4 children)

    The concept of timelines (or that each decision creates a new dimension) ignores almost all of the fundamental laws of physics.

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  • [–] 4 points 10 months ago* (2 children)

    I mean, backwards time travel goes against our current understanding of physics. But multiple dimensions, or the many-worlds interpretation, etc, are not incompatible with our current understanding of physics, no, it's just presently an untestable hypothesis

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  • [–] 3 points 10 months ago* (1 child)

    It doesn't work with the law of conservation of energy for one. Except if you assume a framework of universes, in which anything goes but then you needn't bother with physics at all.

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  • [–] 10 points 10 months ago* (last edited 10 months ago)

    You know what's funny? Conservation of energy isn't true on a universal scale in our universe in the first place. The expansion of our universe over time actually breaks that symmetry. This is why light can get redshifted over travelling long distances. It loses energy into.. nothing

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