(via Sabine Hossenfelder) Is the universe really infinite? Or could it close back on itself like a sphere? If it’s infinite, how can it expand? And is it true that there might be copies of you in it?
The Nature Network on MSN
Could There Be An Edge Of The Universe?
The question of whether the universe has an edge touches one of the deepest mysteries in cosmology. It’s the kind […] ...
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