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http://phys.org/news/2012-11-planck-filament-hot-gas-linking.html
Just think of the sheer size of this guy, it is not gas links between a couple of colliding galaxies, it is the gas link between two galaxy frigging CLUSTERS a billion ly away!
If that were not enough, scroll down and you will find a movie of the 3D structure of a big chunk of the entire UNIVERSE!
Well, MY mind is boggled!