How the Edge of Our Galaxy Defies Known Physics

how to proof and later know that dark matter even exist if currently there is no way of detecting it as we are limited by our technology and or knowledge, many times science is looking for answer at the wrong “place” and too many assumptions made.. all those particles that we keep smashing down to size that becoming so small it is almost meaningless to talk about the size and also the definition of particles almost become blur going to way beyond the subatomic level.. at rate the particles are being smashed by cern how small can it get till it is the real elementary particle that the smallest it can gets.. more questions than answers..and when it comes to gravity nobody have any idea what exactly it is and it interaction with the universe micro level and macro level and this might the key to answer a lot questions that currently maths and physics fragmented in our understand of this universe be it big bang or no big bang..