Paradox-Free Time Travel Is Theoretically Possible, Researchers Say
"The past is obdurate," Stephen King wrote in his book about a man who goes back in
time to prevent the Kennedy assassination. "It doesn't want to be changed."
"Turns out, King might have been on to something."
"Countless science fiction tales have explored the paradox of what would happen if you went back in time and did something in the past that endangered the future. Perhaps one of the most famous pop culture examples is in Back to the Future, when Marty McFly goes back in time and accidentally stops his parents from meeting, putting his own existence in jeopardy."
"But maybe McFly wasn't in much danger after all. According a new paper from researchers at the University of Queensland, even if time travel were possible, the paradox couldn't actually exist."
"Researchers ran the numbers and determined that even if you made a change in the past, the timeline would essentially self-correct, ensuring that whatever happened to send you back in time would still happen."