WorldWideScience.org "is a global science gateway—accelerating scientific discovery and progress through a multilateral partnership to enable federated searching of national and international scientific databases and portals." In terms that the rest of us can understand, this website is a way for researchers, scientists, students, and science enthusiasts to search worldwide science databases all at once. Instead of traipsing the World Wide Web, going through multiple search engines, and spending way too much time looking for one thing, this website allows you to search only once to find what you are looking for. Instead of getting a search result for what John Doe thinks of astronomy, this website will only give you the most accurate, legitimate results. In addition, a traditional search engine could not find many of these results.
The U.S. Department of Energy's Office of Scientific and Technical Information, as a member of the Worldwide Science Alliance, runs the website. This project was started by the United States and the United Kingdom, but has since grown to over 70 participating countries.
For example, I searched for "Leber's Congenital Amaurosis," a genetic eye condition. Be aware that the results do not appear nearly as fast as Google search results, but the results were very accurate. You can narrow your search criteria by year, publication, publisher, author, or subject. Results in other languages can also be translated. Many of the results were published papers by eye experts. The site also gives you the option to receive automatic updates on your search terms, similar to a Google Alert but much more focused.
This resource may be too much for someone just interested in browsing, but if you really want some details on a scientific subject, this is the place to go.