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It was a faint signal, but it told of one of the most violent acts in the universe, and it would soon reveal secrets of the cosmos, including how gold was created.Measurements of the light and other energy emanating from the crash have helped scientists explain how planet-killing gamma ray bursts are born, how fast the universe is expanding, and where heavy elements like platinum and gold come from.All that stuff – including lighter elements – was thrown out in all different directions and is now speeding across the universe.The crash also helped explain the origins of one of the most dangerous forces of the cosmos – short gamma ray bursts, focused beams of radiation that could erase life on any planet that happened to get in the way.Scientists knew that the universe has been expanding since the Big Bang.A month later the whole area where the crash happened would have been blocked from astronomers' prying eyes by the sun.
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