...and it's back. Tabby's Star, for those of us who can't remember, is KIC 8462852 - the star that was found to be mysteriously dimming.
Now, not only have we still not worked out what's going on, but the star is actually dimming at an accelerated pace.
It doesn't make any sense for any natural stellar phenomenon we know of. We might be right back to aliens building a Dyson sphere - the acceleration would make sense if it was a large structure being built around the star.
Or maybe it's a star eating monster. Nom nom...
(It may be more likely it's a natural phenomenon we simply haven't observed before, but dang it, I'm a science fiction writer, I have to like aliens)