As we don’t have any plausible theory of time, it’s difficult to speculate about time-travel. Likewise wormholes, which are presently a theoretical construct and as such are governed by the Einstein-Rosen equations that show any two entangled objects linked by a bridge will be non-traverseable because to any quantity within the bridge itself, the bridge will appear to expand faster than any possible rate of traverse (e.g. the speed of light). All in all, I’m not holding my metaphorical breath.

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