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2022-05-04: Space DOES NOT Expand Everywhere

  • 11:59: ... empty space contains something. Like dark energy. Empty space has a very weak energy density, even in the absence of particles. As space expands, that ...

2020-10-27: How The Penrose Singularity Theorem Predicts The End of Space Time

  • 05:01: ... focusing property of gravitational fields is called the   weak energy condition of general relativity, and it almost certainly holds in ...
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