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Wednesday 25 January 2023

Astrophysicist Joe Pesce: Can a time traveller change the past?

 Can a time traveller change the past? If so, then the universe seems to have an unknown power that can change events.

A new study from the University of Queensland suggests that it is not possible to go back in time and change the events of the past. Even if time travel is possible, a bizarre chain of events can change the timeline. It’s like the plot of a sci-fi movie, but it could be real.

Speaking in a video for The Hill, National Science Foundation program director and astrophysicist Joe Pesce discussed new research on Einstein’s general theory of relativity.

Pesce, who noted that he doesn’t believe time travel will become a reality, said: “The timeline rearranges itself. It self-corrects to avoid any paradox.”

Using COVID-19 as an example, he suggested that if the time traveler tried to stop Patient Zero from spreading the virus, then time would fix itself. So he or someone else could become patient zero and the pandemic would still happen.

Using himself as a hypothetical time traveller, Pesce explained:

“I travel back in time. If I prevent the infection of patient zero and stop the pandemic, then this will remove my motivation for traveling to the past. And that is the essence of the grandfather paradox.”

“So what these researchers found in the math is that events will recalibrate themselves. So maybe I go and stop patient zero, but then I become patient zero and start an infection.”...<<<Read More>>>....