To me the most appealing and mind-bending aspect of string theory – now considered a fairly mainstream approach to a mechanistic understanding of the world – is Brane Cosmology, which suggests we may be “surrounded” by inhabitants of other parallel universes. More fanciful than any new age guru speak, Brane Cosmology opens an almost unbelievable world of possibilities that fit squarely within the theoretical constraints of this notion of how our mechanistic universe works.
We’d be unable to interact directly with these other systems due to complications that arise from living on a “brane”, or large extension of a string. However we might be able to communicate using gravitational forces which may be the product of closed strings and can therefore move between Branes, visualized in Brian Green’s excellent book and PBS series “The Elegant Universe” as slices of bread within a multidimensional loaf.
Please pass the butter?