Is Dark Matter Still Useful?

Dark matter is still useful. It's the thing that seems to hold galaxies together. And it's there, even though we can't detect right? Right? There are a lot of people who are trying to figure out what dark matter is and it's in the realm of possibility that we will be able to sense it one day. But, like, what we need to do is expand our senses with technology. So think about something like the web telescope, and how this great big eye ran into things that you and i, or any human on earth, could never see alone.