In addition to the books that have been posted here, I'd like to recommend the following websites:
This, the BMOC of them all, is of limited use to laypersons like me because so many of it's best features are subscription-only, and subscribing to Nature is not cheap! ($199.00 per year for USA residents.)
The fact that all articles in Nature are peer-reviewed sets it apart from most other sites.
The following are all available as calibre newsfeeds for your e-reader:
This is one of my favorite sites. Rarely does a week go by that I haven't visited this site at least once.
There's an article on today's newspage about how hardening of the arteries has been detected in 3,500 years old Egyptian mummies, which doesn't surprise me. When you're that old, you're bound to have a few health problems!