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Im starting this thread because various and sundry other threads have sort of objectives not related to quantum entanglement itself (not because they are necrotic) and because we lost all the tags on the old threads and only the threads original author can add those tags. This particular post deals with time travel. http://sciencetrib.com/2015/12/computing-with-time-travel/ (Don't click this unless you want to be click-baited to hell). The article is from the scientific tribune. (more appropriately called nested spamming of science news). The original article is here: Paper: “Replicating the benefits of Deutschian closed timelike curves without breaking causality” npj Quantum Information doi:10.1038/npjqi.2015.7 (2015);arXiv:1412.5596 Basically they send messages back in time but do not open them until after they sent them. There is debate about actually opening a message would disrupt causality and quantum mechanics would somehow stop it. One of the paradoxes can be removed by traveling in 'open timelike curves'. Closed timelike curve is : "time-travelling quantum computer could travelaround paths through the fabric of spacetime that loop back on themselves. General relativity allows such paths to exist through contortions in spacetime known as wormholes. IOW these wormholes work under a very limited set of circumstances dependent on the fields that initiated them. Because they never reach back into their own past: