Have any of the neutrino detectors around the world seen odd signals that can't be explained? (i.e. an interaction with dark matter.)
No(t yet). Some neutrino detectors (but not all) can in principle detect dark matter, but nothing has been found yet. One hope lies in the DUNE experiment.
Neil de Grasse Tyson likes to use the term 'Dark Gravity' as the term 'Dark Matter' is leading people to a conclusion. Why do you think about that, if anything?
What is dark gravity? This does not ring any bell to me. After googling it a little bit, it seems to be just one of the numerous dark matter models. But I didn't dig into it so that I won't be able to say more.
Thanks for the reply, I was kind of expecting that answer.
'Dark Gravity': Neil Tyson in this Big Think video here at around 50 seconds into the video. Basically just a pedantic complaint about the 'dark matter' label.
Well, you can like dark matter or not. It nevertheless helps to explain cosmology pretty well. Much better than any other alternative. Now, since we have not discovered it, alternatives are possible. But saying that the dark matter paradigm is wrong is just an unfounded assumption. The good answer is "we don't know yet". :)
astrophysics for people in a hurry, i found the book most enlightening for a layman like myself