For Thursday, May 14, 1998. New sites every weekday, with an expanded weekend edition. For Thursday, May 14, 1998. New sites every weekday, with an expanded weekend edition. There's so much historical info at this site that you could, well, fill a history book.
Categories range from world and American history to travel and aviation.
The online version of the New England Journal of Medicine is a weekly zine reporting the results of important medical research around the world. Only abstracts of articles are available, but they're pretty informative. Full stories can be ordered. There is also a variety of sections ranging from asthma to breast cancer to molecular medecine. Along with complete editorials.