Julio Di Egidio
2023-10-14 15:16:09 UTC
Sabine Hossenfelder, "Is time travel possible?",
2023-10-14 on YouTube:
No, PROPER TIME is *absolute*! It *does* pass for every
observer/clock at the same rate, i.e. in their own frame.
(Here is the 101 on Einsteinian relativity:
Try and understand the role of proper time.)
How can an entire community of physicists (isn't it?)
ever get such a fundamental notion so blatantly upside
down is the real "mystery" here.