Hafele–Keating atomic-clock world flights
🏛️ Official recordFour caesium clocks flown around the world on airliners returned tens of nanoseconds off ground clocks, matching relativity.
VerdictTime dilation is real.
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Time Travel
Travelling to the past or future
Reality checkTravelling ‘forward’ is confirmed by atomic-clock experiments (time dilation), with cosmonaut Krikalev the ‘greatest time traveller’; travel to the past has no evidence, with famous ‘travellers’ all hoaxes or legends.
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Sergei Krikalev: 803 days in orbit
📜 On record803 cumulative days in orbit put him about 0.02 s into the ‘future’ relative to Earth.
VerdictThe largest recorded ‘time travel’ magnitude.
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Mallett’s ring-laser time machine
🎓 Academic researchProposed twisting spacetime with a ring laser to create closed timelike curves; peers note the required conditions are extreme.
VerdictA theoretical proposal.
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The Versailles ‘time slip’ (Moberly–Jourdain)
📜 On recordTwo scholars walking near the Petit Trianon ‘saw’ people and buildings of 1789.
VerdictThe SPR judged it memory reconstruction and misidentification.
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John Titor / Rudolph Fentz / the Montauk Project
✕ Debunked‘2036 soldier’ Titor’s predictions all failed; ‘1876 man hit in Times Square’ Fentz was actually a 1951 Jack Finney story; the Montauk Project has no evidence.
VerdictAll hoaxes or fiction.
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The Vatican ‘chronovisor’ legend
✕ DebunkedClaimed he and scientists like Fermi built a machine to see the past and photographed Christ’s crucifixion; the photo was shown to be a copy of a statue.
VerdictA legend.
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