Does really time exist?
29426
Is there a proof of existence of time?
148726
Are we living in a false vacuum? Is there any way to tell?
20680
Does infinity exist in physical systems?
24480
Can there be true conclusions without assumptions?
20698
What's the difference between space and time?
137961
Will Determinism be ever possible?
42353
If time standard clocks and any memories about the time standard are destroyed, can we recover the time standard again?
100690
Does superluminal travel imply travelling back in time?
121904
Regarding the possibility of Closed Timelike Curves
100178
Time, what is it?
125571
Practical time travel: time dilation above the event horizon
58462
Impossibility of time travel due to energy conservation?
117205
Expansion of the Universe: is new space(time?) being created or does it just get stretched?
49536
Do we really need reals?
133604
How can we be sure about the constancy of atomic clocks as in the Hafele and Keating time dilation test?
32625
More than one time dimension
106272
Do numbers exist independently from observers?