I'm not quit sure whether we had this paper here already, since it is a couple of weeks old. I've seen it here https://phys.org/news/2017-12-dark-energy-mathematicians-alternative-explanation.html and I'm somehow fascinated by the idea to get rid of dark energy as only explanation of current observations. Unfortunately the full text doesn't seem to be freely available, but here's the abstract and some of our members might have access to the journal. Also the long review process is a bit surprising (to me). http://rspa.royalsocietypublishing.org/content/473/2207/20160887 Is there hope that there's something to it, or is it just another unrealistic solution of EFE?