• No reason to think there aren’t other dimensions, and if there are any there might as well be an infinite number, and surely in an infinite number of dimensions someone in at least one of them discovered how to travel between them.

    • I think you’re confusing dimensions with parallel universes.

      Dimensions are just coordinates needed for describing an object.

      In practical physics, we have 4 dimensions, 3 to define an objects location (e.g. x, y, z) and 1 for it’s moment in time.