The Dark matter page on CERN's official website describes dark matter as if it were regular matter just with some mysterious properties. This was a surprise to me because every time someone mentions dark matter, it's usually followed by "We know nothing about it". I've heard that we know about its distribution and its effects but to my knowledge we don't really know what it actually is.

So this got me thinking, is there any evidence (or theoretical models) that might suggest that dark matter is actual matter made of particles (that we might not know of yet) rather than an intrinsic property of spacetime, a fundamental interaction or maybe something else?

  • $\begingroup$ Possible duplicate of Is Dark Matter called "Matter" only because of gravity? $\endgroup$ – John Rennie Jul 26 '19 at 16:43
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    $\begingroup$ Hi Conny. I think the two questions I've linked cover are basically the same as yours, but if you disagree ping me and I'll reopen the question. The basic idea is that we call it dark matter because it dilutes at the same rate as visible matter as the universe expands. $\endgroup$ – John Rennie Jul 26 '19 at 16:46