Science.gov is a gateway to government science information and research results. Currently in its fifth generation, Science.gov provides a search of over 60 scientific databases and 200 million pages of science information with just one query, and is a gateway to over 2200 scientific websites. Science.gov 5.0 provides the ultimate science search through a variety of features and abilities, including: Accessing over 55 databases and 200 million pages of science information via one query, Clustering of results by subtopics, authors, or dates to help you target your search, Wikipedia results related to your search terms, Eureka News results related to your search terms, Mark & send option for emailing results to friends and colleagues Download capabilities in RIS, Enhanced information related to your real-time search, Aggregated Science News Feed, also available on Twitter, Updated Alerts service, Image Search.