I'm not a physicist or mathematician at all, just very curious, so sorry if this is a dumb question.
Now I understand we can make astronomical observations and say, "Oh, 85% of gravity in the universe is unaccounted for, so very indirectly, we've detected dark matter." By the way, I think it's better described dark gravity, because we don't know that it's matter, but I digress.
So I loosely understand the trouble detecting this stuff is that it doesn't interact with ordinary matter, the same kind our detection equipment tends to be made from. Is it instead possible to look for it indirectly, perhaps its effect on spacetime? I suppose you could say that's what the astronomical observations are, but I'm thinking more along the lines of an experimental apparatus. Something specifically designed to detect - and only detect - dark matter particles (if that's what they are), so when one flies by, it's unmistakable signature is observed on spacetime.
I suspect the response will be that spacetime isn't something we can see or build something to monitor in this way, or the effect of a single dark matter particle would be too small to observe on a section region of spacetime, but what the heck...
Is there a way we might be able to observe spacetime being tugged this way or that by a dark matter particle passing by? Or maybe some lasers or particles being disrupted due to a change in spacetime that can only be explained by dark matter being about.