Recently is found special Galaxy without Dark Matter, and so is concluded, what there is Dark Matter in cosmos. There is action of Dark Matter, but Dark Matter itself is not detected: it has no material interactions (no strong, no weak, no electromagnetic). A matter without matter interactions is not matter. If a matter curves space-time (and produces gravity then), why then Dark Matter curves the space-time? It is miracle! It is divine miracle! Bound before your God!
Dark matter is only known to be non-interacting with light. It has mass; for all we know it could have a strong interaction.
The Gravity is not material interaction, because it is not a force-field in General Relativity: the free falling body feels no-force but the weightlessness.
What are you talking about? It's not a force, relativistically speaking, but it can be simulated like any other force.
The Academic Science is built on the conservation Laws (latter are defined as divine-free [it means natural] mechanisms to control the Nature). Showing the violation of latter, one opens door to any models of the Reality, including the Flat Earth. But indeed, the action of Dark Matter and Dark Energy is without source: no Dark Matter was observed practically or theoretically.
We have a pretty good idea where dark matter is, in theory. The lack of observation through light is not evidence that it isn't there.
There are two kind of models: Flat Earth model (it uses God's Grace to bent the lights and motions, to make objects appear to any observer as being far away), and the Round Earth. The latter kind of Science came to conclusion, that "the Universe should not exist." The people, who said ``Earth is round" have said also ``There is no Earth, because the Universe should not exist".
https://www.researchgate.net/publication/325022362_Violation_of_energy-momentum_conservation_Laws
One video is longer, than other. But the Academic Science destroys itself:
“The collapse of physics as we know it”
https://www.liveleak.com/view?i=4ac_1372191290
“Science v s God Its The Collapse Of Physics As We Know it”
www.dailymotion.com/video/x2jbd7x
The Academic Science came to conclusion, that round Earth (and flat, no matter) does not exist. What is better: existing Flat Earth Model with God, or non-existing Spherical Earth without God?
"Michio Kaku - The Universe Shouldn't Exist"
https://youtu.be/esPXpagkVwY
Congratulations on identifying one of the biggest open questions in science! There are many ideas that physicists have, and our lack of understanding of the history of the universe is in no way related to our knowledge of the Earth's shape.