Thursday, 4 July 2019

modified gravity - Does dark matter have to be matter?


There is a very similar question to this one: Is dark matter really matter?. But the particular aspect I'm asking about seems not to be mentioned there. So, here we go:


Does dark matter have to exist as matter? Or, is it possible that space-time is just naturally not flat, but slightly crinkled? Obviously heavy objects can bend space-time, and if, as a layman, I understand it correctly, this is what we perceive as gravity. What now, if space-time is naturally not quite flat, and we perceive this non-flatness as dark matter?




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