Cosmo Posted April 10, 2022 Share Posted April 10, 2022 Some theories, like special and general relativity, predict that if specific spacetime geometries or particular forms of motion in space were allowed, time travel into the past and future may be achieved. Scientists have discussed creating closed timelike curves, which are world lines that form a complete loop in spacetime, enabling an entity to return to the past. General relativity equations solution models, such as the Gödel spacetime, have closed timelike curves, but their physical validity is unknown. Even if time travel is theoretically feasible, any theory that would enable it would have to deal with issues of cause and effect. The "grandfather paradox" is a well-known example of a causality problem: what would happen if someone went back in time and killed their grandpa before their father was born? According to some scientists, one way to avoid these paradoxes is to use the Novikov self-consistency principle or a variant of the many-universes interpretation of interconnected worlds. Here in Time Travel Science, we discuss scientific principles and hypothesis related to the field of time travel research. This includes, but is not limited to: The chronology protection conjecture Paradox and causality Quantum mechanics Radionics devices DIY experiments Gravity and general physics Science-minded discussion not related to time travel should be posted in Mad Science. Link to comment Share on other sites More sharing options...
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