While our current understanding of physics is predictably-wrong, it has no particular reason to be wrong in a way that is convenient for us.[1]
Meanwhile, more refined versions of some of the methods described here seem perhaps doable in principle, with sufficient technology.
You can make difficult things happen by trying hard at them. You can’t violate the laws of physics by trying harder.
Out of the many things that might be wrong about the current picture, impossibility of time travel is also one of the things I’d least expect to get overturned.
While our current understanding of physics is predictably-wrong, it has no particular reason to be wrong in a way that is convenient for us.[1]
Meanwhile, more refined versions of some of the methods described here seem perhaps doable in principle, with sufficient technology.
You can make difficult things happen by trying hard at them. You can’t violate the laws of physics by trying harder.
Out of the many things that might be wrong about the current picture, impossibility of time travel is also one of the things I’d least expect to get overturned.