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1 " nostalgia, underlying cosmological explanation forWeak but detectable interaction between two neighboring universes that are otherwise not causally connected.Manifests itself in humans as a feeling of missing a place one has never been, a place very much like one’s home universe, or as a longing for versions of one’s self that one will never, and can never know. "
― Charles Yu , How to Live Safely in a Science Fictional Universe
