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one was used in Star Trek to slingshot around the sun, back into earth history. It seems to me that while time travel backwards has been declare impossible due to physics, the Star Trek universe has the habit of managing to travel backward in just about any bit of technology. I'm sure if we started the list, "Star Trek technology used to travel backward in time" would become quite extensive. -maxnort 98.115.161.194 (talk) 19:38, 17 May 2023 (UTC)[reply]