Hubble Telescope Finds Ring of Dark Matter

US astronomers on Tuesday presented the most solid proof yet of the existence of dark matter, a mysterious substance believed to make up more than a quarter of the universe.

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<p><a href="http://www.physorg.com/news98450367.html">Hubble Telescope Finds Ring of Dark Matter</a></p> <p>US astronomers on Tuesday presented the most solid proof yet of the existence of dark matter, a mysterious substance believed to make up more than a quarter of the universe. </p>