Debbie Moon at 2012-08-31 19:31:43:
British science weekly New Scientist has a twitter feed, @newscientist, linking to online versions of most brief news items from the magazine.
Alternatively, buy the actual magazine for the more in-depth features, which are eye-opening and inspiring, and surprisingly understandable.
The Wellcome Trust does a lot of work linking the arts and sciences (including a screenwriting competition that's just closed for entries), and their site has a lot of links and information. Until this week (!) they did have a weekly new e-mail, but that's now ended and is being replaced by... something. Check their website.