Science

Nature  -  "The world's best science on your desktop." Biotechnology, cancer, chemistry, medicine, earth sciences, biology, physics, ...
Sports Illustrated  -  "SI.com presents round-the-clock coverage of breaking sports news, the latest scores and statistics, fantasy sports and games, live-streaming video and multimedia features. SI.com also provides the unique viewpoints of SI’s writers, columnists and reporters – the best and best-connected in the business – as well as the compelling work of its renowned photographers."
Discover Magazine Online  -  Scientific articles by Discover Magazine. Free articles as well as a member's area.
National Geographic Online  -  "Resource for scientific discovery, photography, travel, exploration, maps, news, live webcams, educational tools, and an online store from the National Geographic Society."
New Scientist  -  "Daily science news and technology news, hot topics, and a comprehensive database of science jobs and technology jobs."
Popular Science  -  Science, computers, Internet, medicine, technology, autos, electronics, aviation, space, ...
Science Daily  -  "Your Source For The Latest Research News. ScienceDaily is one of the Internet's leading online magazines and Web portals devoted to science, technology, and medicine. The free, advertising-supported service brings you breaking news about the latest discoveries and hottest research projects in everything from astrophysics to zoology."
Science Magazine  -  Science Magazine, published by the American Association for the Advancement of Science.
Science News Online  -  Weekly news magazine of science.
Scientific American  -  "Science and Technology from Scientific American: daily science news and technology news, science trivia, science experts, science newsletters, science shop, science books and more."
Yahoo! News - Science  -  Popular science news headlines from Yahoo!