PBS NewsHour: 'Even Light Can't Escape' Newly Discovered Massive Black Holes

Astronomers recently discovered two massive black holes more than 300 million light years away. Nothing, not even light, can escape the pull of these black holes, which are each 10 billion times the mass of the sun. University of California, Berkeley professor Chung-Pei Ma joins Gwen Ifill to discuss the latest findings.


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