sciencenews.org - best overall for concise coverage (reading the print version for almost 50 years);
newscientist.com - unique articles, can be a bit sensationalistic;
physorg.com - details;
sciencedaily.com - details;
NY Times Science section;
sciam.com - Scientific American
sciencenews.org - best overall for concise coverage (reading the print version for almost 50 years); newscientist.com - unique articles, can be a bit sensationalistic; physorg.com - details; sciencedaily.com - details; NY Times Science section; sciam.com - Scientific American