Updated, 8:15 p.m. As you may have noted, this is the centennial of the extinction, on Sept. 1, 1914, of the passenger pigeon, which once darkened skies in flocks of a billion or more birds. (dotearth.blogs.nytimes.com)
Like the passenger pigeon, it once darkened the skies with huge flocks but now is only seen occasionally, he laments. (sciencemag.org)
NIGHT AND DAY Solar physicists gained new insight into the origins of coronal mass ejections as they watched the 2015 solar eclipse darken the sky above Svalbard, Norway. (sciencenews.org)