Astronomers discover upper mass limit for black holes

There appears to be an upper limit to how big the universe's most massive black holes can get, according to new research led by a Yale University astrophysicist.

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<p><a href="http://www.physorg.com/news140370694.html">Astronomers discover upper mass limit for black holes</a></p> <p>There appears to be an upper limit to how big the universe's most massive black holes can get, according to new research led by a Yale University astrophysicist.</p>