If you want to keep on top of the latest in scientific news and discoveries, here are a few informative links:

http://www.sciencedaily.com ScienceDaily is a free, advertising-supported online magazine that brings you breaking news about the latest discoveries and hottest research projects in everything from astrophysics to zoology.
www.sciencenews.org This is the on-line version of Science News, the only weekly news magazine of science published in the U.S. It tells succinctly, in words and photos, the important progress of science research and technology.
www.sciencefriday.com Science Friday is a weekly science talk show, broadcast live over public radio stations nationwide. The program features science topics that are in the news and try to bring an educated, balanced discussion to bear on the scientific issues at hand.
www.loe.org Living on Earth is the weekly environmental news and information program distributed by National Public Radio, which covers news, features, interviews and commentary on a broad range of ecological issues.
www.cnn.com/HEALTH/index.html CNN's extensive coverage of all the latest scientific news and breakthroughs. This site features multi-media services including video archives, discussion boards and a Doctor's Q&A.
www.cnn.com/TECH CNN's extensive coverage of Technology issues - from computing to personal technology and space news. This page also features a variety of interactive, multi-media services.
www.pbs.org/healthweek Public Broadcast System's weekly, health news magazine. HealthWeek Online is produced for HealthWeek by washingtonpost.com.
www.sciencecoalition.org The Science Coalition represents more than 400 member organizations, working to expand and strengthen the federal government’s investment in university-based scientific, medical, engineering and agricultural research.
www.groks.net Berkeley Groks is a weekly radio program covering developments in the world of science and technology and airs on UC Berkeley's radio station, KALX 90.7 FM.