Article: In a map of dark matter, clues to galaxies' histories; Researchers unveil 3-D view of a part of 'unseen' universe.(USA)

Byline: Peter N. Spotts Staff writer of The Christian Science Monitor

The map of the universe, which astronomers have been plotting for some 20 years, reveals that the vast numbers of visible galaxies are not randomly arrayed, but rather display a breathtaking structure. Now scientists are detecting structure in the universe's unseen "dark matter" - whose gravity herds stars into galaxies and galaxies into enormous clusters tens of millions of light-years across.

Sunday, a team of astronomers unfolded the first large-scale map of dark matter, one of the cosmos's most enigmatic ingredients. Such maps are vital to understanding how galaxies evolved and ...

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