If the universe is closed, does the twin paradox really matter?
3644
Symmetrical twin paradox in a closed universe
34400
Special Relativity - Regarding the Simultaneity of Events During the Train Paradox
50360
How would wormhole-based FTL violate causality?
60364
Universe Expansion as an absolute time reference
92674
Could spontaneous symmetry breaking happen again in our universe?
139471
What if the size of the Universe doubled?
103910
Massless string Paradox
105865
The twin paradox and positively curved space
111355
Explanation for a much simpler version of the twin paradox?
16869
Why is the Continuum Hypothesis (not) true?
126980
What happens at the interface between two universes with opposite thermodynamic arrows of time?
78769
Assuming that the Cosmological Principle is correct, does this imply that the universe possess an empirically privileged reference frame?
145603
Would time still exist after Heat Death of the Unverse?
96564
Is it valid to apply Einstein's Relativity to scenarios involving expansion of space?
60271
Zeno's arrow paradox
118813
How can Zeno's dichotomy paradox be disproved using mathematics?
100434
Would there be centrifugal force if I were alone in the universe?