Dark Matter Bridge between two galaxies with 50 million distance. Quote:
"Results show the dark matter filament bridge is strongest between systems less than 40 million light years apart. Dark matter filaments bridge the space between galaxies in this false colour map. The locations of bright galaxies are shown by the white regions and the presence of a dark matter filament bridging the galaxies is shown in red. Credit: S. Epps & M. Hudson / University of Waterloo. ( Newscientist april 2017)"
https://sciencesprings.wordpress.com/2017/07/02/from-waterloo-waterloo-researchers-capture-first-image-of-a-dark-matter-web-that-connects-galaxies/
The fact that these two galaxies did not merge, is reason to assume that the dark matter bridge is torn out by mutual gravity effects, of both galaxies, perhaps combined with the spacetime absorption of dark matter black holes .
A second indication that dark matter is massless or has less inertia, but equipped with gravity effects.
Abell 222 and 223. with bridge.
Conclusion: for the dark matter clumping in between three galaxy clusters ( below) they also did not merge already, but will definitely merge in the future.
Dark Matter (= black holes) has different or even NO inertia !! but still show gravitational spacetime curvature effects.
