Does Dark Matter Really Exist? A Scientific American Special Report Contents Ninety-five percent of the universe has gone missing. Or has it? -- By Mordehai Milgrom Of all the many mysteries of modern astronomy, none is more vexing than the nature of dark matter. Most astronomers believe that large quantities of some unidentified material.... EUC - Excellent used condition.  8" x 10-3/4", 10 pages  Item in photo is actual item you will receive Check out my other items! Thanks for stopping by!!

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