RT @newscientist: The sound of two black holes colliding, now available as a ringtone: https://t.co/TCUjcZtm8u https://t.co/W6MkA9bWf6 0 atbildes

Jānis Ulme
(2016-02-15 16:29:27)
@twitter
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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