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Stairway to Heaven

Scientists have found a kind of bridge made up of galaxies that connects two galaxy clusters. When these two, along with a third cluster, smash together in several billion years, they will form one of the largest galaxy superclusters in the universe: http://www.jpl.nasa.gov/news/news.cfm?release=2012-139&cid=release_2012-139&msource=12139

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