One for the history books. Another confirmation of Einstein’s theory of general relativity and an observation of a merging black hole binary system with subsequent ringdown to the resulting single black hole. If you hit the PDF button you can download the submitted article. Very interesting.

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.061102 <http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.061102>

Dave