Page "Parallel universe (fiction)" Paragraph 8
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Parallel universes are considered parallel because there is no way of reaching them.
Not all other dimensions are parallel, but more than likely most of them are.
An Einstein-Rosen bridge, or wormhole, can take you to a different dimension.
Note that the journey through space-time continuum could age you backwards, or wipe you from existence.
More than likely, if you managed to get to the alternate dimension, then you would have no memory of how you got there.
The dangers of time-space travel are still being investigated, and possibilities are growing.
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