Did you know our universe has scars that could hold the key to time travel? These cosmic scars, called cosmic strings, are massive, invisible cracks in space-time left over from the early universe. Scientists believe that if we could find and understand them, they might reveal ways to bend time itself! Some theories even suggest that traveling along these cosmic strings could let us jump between different moments in history. It sounds like science fiction, but top physicists are taking it seriously.
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