How the Edge of Our Galaxy Defies Known Physics

Hey physics girl I love your show I just have to stop you at 2 minutes and 43 seconds. At that point you state that the only possible thing holding the Galaxy together could be gravity however recent discoveries by NASA show that not only are galaxies being actually fed by intergalactic filaments. 
Those intergalactic filaments are made of plasma and have also been discovered recently to be magnetized. 
It is highly that the dark matter everyone is looking for is actually an electrical or magnetic force that has been ignored at the large scale as a candidate for dark matter