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by ben_w
996 days ago
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> no good reason is ever given as to why it could be matter and not anything else The options are 1. matter; 2. energy; 3. new physics. We'd expect pure energy to not stay still for long enough to do anything. Lots of people are looking for new physics, and would be anyway even if it weren't for all the things that made us look for dark matter in the first place, because of the whole "relativity and quantum mechanics don't play well together, and neither is sufficient by itself" problems. Dark matter requires something new, given it can't be explained by baryons or black holes, so it too needs some new physics — though as "matter" it would be in the particles-and-fields area rather than the how-does-spacetime-even area which the not-actually-matter solution would be. |
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