Fast radio burst tracked to faraway galaxy

An international team of scientists using a combination of radio and optical telescopes has for the first time tracked the source of a "fast radio burst" - a fleeting explosion of radio waves which, in this case, came from a galaxy six billion light-years away.
The cause of the big flash (the 17th ever detected) remains a mistery, but spotting a host galaxy allows scientists to confirm the current cosmological model of the distribution of matter in the universe and thus to "weigh the Universe".
These findings are published in Nature: http://www.nature.com/nature/journal/v530/n7591/full/nature17140.html