Q
Is time travel possible?
A
Expert Answer
General relativity permits time travel in some solutions (wormholes, rotating black holes, cosmic strings), but these require exotic conditions that probably don't exist or are unattainable. The 'chronology protection conjecture' suggests quantum effects prevent time travel paradoxes.
Key Insight
General relativity permits time travel in some solutions (wormholes, rotating black holes, cosmic strings), but these require exotic conditions that probably don't exist or are unattainable.
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