RT @newscientist: The sound of two black holes colliding, now available as a ringtone: https://t.co/TCUjcZtm8u https://t.co/W6MkA9bWf6
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Written by
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RT @newscientist: The sound of two black holes colliding, now available as a ringtone: https://t.co/TCUjcZtm8u https://t.co/W6MkA9bWf6
