Also known as: science.gov

"Science.gov contains reliable information resources selected by the respective agencies as their best science information. Two major types of information are included - selected authoritative science Web sites and databases of technical reports, journal articles, conference proceedings, and other published materials. (The specific content varies by database.) The selected Web sites can be explored from the science.gov homepage. The Web pages and the databases can be searched individually or simultaneously from the search page." (From the site's "About" page.)

http://www.science.gov/browse/w_115.htm