Has anyone ever seen a roll cloud? I haven’t. (APOD via julia)
Anyone who has ever visited San Francisco’s Fisherman’s Wharf has probably hung out with the sea lions of Pier 39, who first appeared after the 1989 earthquake. You should have heard by now about their recent mysterious mass departure, which had left some speculating that they had some sixth sense about an impending disaster such as another major quake. Now, it appears, it has been determined that there is a simpler explanation. In this El Nino season, they have simply gone after their shifting food source. (SFist) This is not to say, it seems to me, that they are not canaries in a coalmine with respect to a different sort of impending disaster, climate change.
“Observations have shown that nearly every galaxy has a supermassive black hole — a black hole with a mass of one million to one billion times that of the sun — at its center and that galaxies often collide and merge to create larger galaxies. Astronomers have expected to find many mid-merge galaxies by focusing on the two supermassive black holes, which should be orbiting each other in the middle.”