Observationally distinguishing a galaxy of antimatter from a galaxy of matter
129816
Experimental observation of matter/antimatter in the universe
45174
Measuring extra-dimensions
41750
The age of the universe
151937
Physical Significance of $8\pi r$
86456
Could the universe's antimatter be hiding in black holes?
69025
How do we know Dark Matter isn't simply Neutrinos?
41209
Does matter with negative mass exist?
5266
Resource Recommendations: General relativity, local tetrads and particle physics
60669
What does the cosmic neutrino background look like today, given that neutrinos possess mass?
54717
Is there a model relating GW signal and luminosity of the merger / burst?
99150
Is there evidence of dark matter in our galaxy?
61618
Could the missing antimatter lie outside the observable universe?
52112
Dark matter and dark energy references
106989
How does dark matter halo outside a galaxy help to explain galaxy rotation curve?
114934
Bootstrap Paradox in Interstellar
20960
Seeing the shadow of a black hole
28757
What happens when a "matter-black-hole" and an "anti-matter-black-hole" collide?