Is matter a continuous part of the field of space-time?
42343
Is spacetime all that exists?
14329
What is known about the topological structure of spacetime?
137342
Can spacetime be non-orientable?
144771
Is there any thing composed of elementary particles in this world that is not 3 dimensional?
95295
Is the Universe Past-Eternal?
131016
Question about Klein-Gordon field Lagrangian
117205
Expansion of the Universe: is new space(time?) being created or does it just get stretched?
5247
Physical meaning of non-trivial solutions of vacuum Einstein's field equations
78916
Particles entangled after the big bang
74931
Are holes a fundamental particle? Are they a real thing or just a construct?
148838
Is the total mass of the universe constant in time?
113249
Does time exist in a vacuum?
95681
If the universe is 3D, how is space-time like a "fabric"?
54898
Does Noether's theorem also give rise to quantities conserved over space?
115333
How exactly and WHY does matter affect space-time?
42584
Curved space-time VS change of coordinates in Minkowski space
88019
How can mass affect spacetime?