AllNews'Balck Hole Collision' - 1 News Result(s)Scientists Detect Gravitational Waves From Black Holes Colliding 3 Billion Light-Years From EarthWorld News | Ben Guarino, The Washington Post | Friday June 2, 2017 The first gravitational wave discovery was announced in February 2016 and the second a few months later. www.ndtv.com'Balck Hole Collision' - 1 News Result(s)Scientists Detect Gravitational Waves From Black Holes Colliding 3 Billion Light-Years From EarthWorld News | Ben Guarino, The Washington Post | Friday June 2, 2017 The first gravitational wave discovery was announced in February 2016 and the second a few months later. www.ndtv.comYour search did not match any documentsA few suggestionsMake sure all words are spelled correctlyTry different keywordsTry more general keywordsCheck the NDTV Archives:https://archives.ndtv.com