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Cosmic Collisions of Black Holes

Einstein was right about gravitational waves; Ethiopian bloggers under threat; safe zone in Syria?

(Photo: Laser Interferometer Gravitational-wave Observatory (LIGO) research optic Credit: Reuters)

50 minutes

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Thu 11 Feb 2016 21:06GMT
91热爆 World Service Online, UK DAB/Freeview, Europe and the Middle East & Americas and the Caribbean only

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  • Thu 11 Feb 2016 21:06GMT
    91热爆 World Service Online, UK DAB/Freeview, Europe and the Middle East & Americas and the Caribbean only

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  • Newshour

    Interviews, news and analysis of the day's global events.