"“What time travel means here is stepping between those histories — that’s even freakier,” astrophysicist and dark matter expert Geraint Lewis at the University of Sydney, who was not involved in the research, told New Scientist. “At some level it doesn’t even feel like time travel anymore, because what’s the point of going back and killing Hitler if the second world war still plays out in the universe you’re from?”"
Hmm, but what's to stop you from THEN traveling back to your own timeline and changing it? The article isn't very clear about how that works.
https://futurism.com/paradox-free-time-travel-parallel-universes
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