"Astronomers who stumbled upon a powerful burst of radio waves said on Thursday they had never seen anything like it before, and it could offer a new way to search for colliding stars or dying black holes." It lasted only 5 miliseconds and came from 3 billion light-years away and we don't know what it is. "We think it has got to be some sort of catastrophic event happening in another galaxy -- like two stars colliding and merging or maybe a black hole. Something kind of exotic."
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