10 Mind Bending Theories About Time Travel

10 Parallel Universes Quantum mechanics suggests the existence of the ‘Multiverse’ – infinite splitting universes

It eradicates time-travel paradoxes which prevent going back in time, because every conceivable outcome is possible 9 Speed of Light Time slows down the closer we travel to the speed of light If you spent 1 year on a train going 99999% lightspeed, 223 years would pass on earth

8 An Impossible Journey The only way you can go back in time is by traveling faster than the speed of light Einstein proved that to do this, you’d need an impossibly infinite amount of energy 7 Tipler Cylinder An infinitely-long, rotating tunnel, which is 10x the sun’s mass, exists within spacetime

If your spaceship entered a tipler cylinder spinning billions of revolutions per minute, you’d go back in time 6 Doughnut Vacuum By manipulating gravitational fields, we can warp matter & create a massive doughnut of spacetime Traveling round this time loop could send you back to any moment after the doughnut vacuum was created 5

Wormholes Wormholes – tunnels that exist in spacetime – are shortcuts to the past & future But these spacetime tunnels are so small that only tiny particles of matter can pass through them 4 Black Holes Black holes are so dense that even time is slowed down by its gravitational pull If a spaceship orbited a black hole, the crew would experience half the time of people elsewhere

3 Quantum Tunneling By copying how electrons move, we can achieve time travel Moving from A to B without passing through the space in between breaks the light barrier without going at dangerous lightspeed 2 Cosmic Strings Cosmologists discovered mysterious ‘cracks in the universe’ which formed moments after The Big Bang

They’re so dense that if two hit each other they would warp space & make a time loop 1 The ‘God Particle’ The discovery of CERN’s elusive Higgs boson particle means that lightspeed travel might be possible By ‘switching off’ the Higgs, we could one day ‘un-mass’ objects & time travel

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