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RT @StarshipBuilder: Some remarks on a new exotic spacetime for time travel by free fall https://t.co/lSxqI0Dfzl
RT @StarshipBuilder: Some remarks on a new exotic spacetime for time travel by free fall https://t.co/lSxqI0Dfzl
RT @StarshipBuilder: Some remarks on a new exotic spacetime for time travel by free fall https://t.co/lSxqI0Dfzl
Some remarks on a new exotic spacetime for time travel by free fall https://t.co/lSxqI0Dfzl
Some remarks on a new exotic spacetime for time travel by free fall. https://t.co/ZRNMEoDC53