Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
AMA | September 2024
Sean Carroll
Reference frames, different ways of putting coordinates on space and time, and in some sense all such frames are equally good, means that if you can have a particle going faster than the speed of light, you can have a particle going backward in time. And so the worry that I was referring to in that chapter was faster-than-light travel seems to indicate time travel.
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