Do you think dark matter is real or could?

If you want to discuss dark matter, then you should be able to discuss blackholes, and whiteholes. They're all branches of the same theoretical/experimental body of work.

What we know, is that, based on (again, on what we know), of the size/mass of the galaxies, and in order for the universe to make sense (again, based on the start of the art of Physics), the galaxies cannot possibly be "held together", by their own "observable" matter. So, based on the matter we "see", galaxies should be spinning loose and out of control.

This means that there is something out there, that we cannot see, but seems to be 6 times the weight of visible matter.

If, indeed it is what we theorize it to be, then it's immune from EMF, so essentially it neither absorbs, nor reflects light. So, we can't see it, ergo, Dark Matter. Up until the era of modern Physics, we invented something called the Ether, to explain certain things, and it made sense at time, based on our understanding of science, at the time. Turns out there is no Ether. Perhaps Dark Matter is the new Ether, or maybe not.

That's really about as much as we know about it, at this point, but a good segment of researchers in Physics, are very busy, trying to figure it out.

That aside, there's also the matter of Dark Energy (not related to Star Wars), which is distributed across both time and distance, throughout the universe, but that's a different topic.

yeah dark matter definitely does exist! the figures for what percentage of the total matter content it is are still quite uncertain tho. our own galaxy has significant amount of dark matter in it actually. The problem is that it's incredibly difficult to detect (we haven't directly detected it yet). But we know it exists because of early-universe simulations and because of statistical data regarding how fast galaxies rotate as a function of the distance from their centers! The leading theories for the nature of dark matter are WIMPS (weakly interacting massive particles) and objects called primordial black holes, which are black holes that are very very small and formed very early on in the lifetime of the universe.

I find it hard to understand how we only discovered something so strange and as important as that so recently and know so little about it.