I guess the options aere: (1) dark matters is a property of physics. IE, it is the effects of physics that we don't understand yet, but has consequences to matt

I guess the options aere: (1) dark matters is a property of physics. IE, it is the effects of physics that we don't understand yet, but has consequences to matter and the properties/rules of matter that we do understand. (2) Dark matter is stuff, actual matter that we just can't "see". Matter in other dimensions is I guess a combination of the two. Actual normal matter, "hidden" by properties of physics that we don't quite understand.