NBCNews.com | Dark matter is running out of places to hide from scientists NBCNews.com Dark matter is an elusive substance that is invisible and almost never detected, except by its gravitational pull. Yet astronomers say it likely makes up a quarter of the entire universe and dwarfs the amount of normal matter (galaxies, stars and ... |
Tuesday, November 27, 2012
Dark matter is running out of places to hide from scientists - NBCNews.com
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