Report, if you have a problem with this page“ 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
From : How to Live Safely in a Science Fictional Universe