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Science.gov

Your Gateway to U.S. Federal Science


Search Help Topics

See Alerts Help for Information on the Alerts Service

Try our Basic Search Basic Search

  • Just type in your key word(s), like "climate change", and select Search.
  • You'll get results ranked by relevance. The higher the number of stars,stars the more relevant the document is to your query.
  • You will also see two tabs on the left side of the screen, Topics and Visual. On the right, you will see the related Wikipedia term, as well as related EurekAlert! news items.
  • Unlike many search engines, our results are retrieved in real time. So as results start to come in, you may want to select "Add Results" to update. You may work with your results while Science.gov continues searching.
  • Don't miss our Featured Search, located underneath the search box on our homepage. These are relevant science topics, updated regularly.

You want a more Targeted Search? Try our Advanced Search

  • You can customize your search by checking selected databases and websites.
  • You can search Full Record, Title, Author, and Date Range.
    • Full Record will search the entire content of a document, when available.

    • You may choose to search any of all fields using this dropdown feature: Match: All or Any Field(s).

      • ALL is the default, and finds results with terms occurring in all fields where you have entered a search term.

      • ANY finds results with terms occurring in any of the fields where you have entered a search term.

    • Date Range allows you to search one or more years in the ‘From’ and ‘To’ drop-down boxes.

      • Leaving the boxes blank is the default, and will not use a date in the search.

      • Selecting different ‘From’ and ‘To’ years will search the specified range; you must select a 'To' date. Only selecting a 'From' date will generate an error message.

      • Selecting the same ‘From’ and ‘To’ years will search a single year.

      • Selecting only the ‘To’ year will search any year including and prior to the year selected.
  • Categories or individual sources can be selected for a specific search. Deselect the check box to view individual sources to search.

  • Search runs the search.

  • Clear All clears the search terms in all fields and reverts to default settings.

Search Results

Your results will appear, in order of relevance, in the middle section of your screen. You may also sort results by rank, date, title, or author or limit to specific sources.

    Topics
    • Under the heading Topics, at the left of your results page, your results have been grouped into topic clusters related to your search term.
    • Clustering can help guide you to needed results by grouping result documents into meaningful sets.
    • Just select one of the topics, authors, or years, and you will see those results, also relevancy-ranked.
    Visual feature
    Visual
    • The visualization feature is an interactive tool that groups results topics into an easy-to-view “visual” format, providing an instant colorful overview of the text-based topics, with up to three levels of sub-topics under each main topic heading.
    • This feature is located on the left side of the results page in the cluster area.¬† By default, the text-based topics appear in the left column.¬† Users must click the Visual tab in order to view the graphic representation of the results.
    • This tool appears as a doughnut chart displaying major topics in the center and subtopics radiating out from those.¬† Hovering the mouse over any section will display the topic represented by that section, and clicking on any section will list those results in the results pane.
    • Arrows beside topics indicate there are more result clusters within that section.

    Text and Multimedia
    • Search results can easily be filtered into text only or multimedia only results. There are tabs at the top of the results pane. You can select either to view only that type of result.

    Wikipedia
    • If Wikipedia contains an exact match for your term, it will be provided on the right of your results page, along with a link to the complete Wikipedia entry.
    • Wikipedia is a multilingual, Web-based, free content encyclopedia project.
    • More information is available on the Wikipedia website.

    EurekAlert!
    • EurekAlert news items related to your search term will be provided on the results page in the right column under the Wikipedia result.
    • EurekAlert! is an online, global news service operated by AAAS, the science society.
    • More information is available on the EurekAlert website.

    Navigation Bar
    Navigation Bar

  • You may perform a new search by selecting the New Search link from the navigation bar.

  • You may view your selections by selecting My Selections from the navigation bar.

  • You may clear selections by selecting the trash icon from the navigation bar.

  • You print sets of results by selecting the printer icon from the navigation bar.

  • You can email your results by selecting the envelope icon from the navigation bar. You may select the number and format of the emailed results.

    You can set session preferences after each search by selecting the wrench icon from the navigation bar.
    Session Preferences
       
    Additional Results Available
    Once you initiate your search, you may see this dialogue box. You may choose Include to get more results or Do not include to return to your original search list.
       
    You can narrow the search by searching within the results of your original query. Select Refine Search and then enter your term.
    Refine Search

Selecting and Exporting Results

Selecting and Viewing Results

Checking the box next to any result will add that result to Your Selections.  These selections remain available for viewing until you delete them or close your browser.

The My Selections link, directly above your results pane, allows you to view results you have selected, with the option of exporting them into your citation manager.


You can clear all selections by clicking the trash icon above the results pane, or by clicking the minus icon beside each selection. 

From the Your Selections page, select Back to previous pageto return to your original result list.

Exporting Results

Available result export options include emailing results, citations export and printing. If you use a bibliographic reader such as EndNote, RefWorks or Bib Tex, you may download the selected results into your citation manager via an RIS formatted download. Your citation manager should automatically display the results downloaded.

Emailing Results

  • The envelope icon above the results pane allows you to email a set of results to yourself, friends, or colleagues
  • Select the envelope icon, and enter the required information, indicated by red asterisk:
  • You can email only your selected set of results.
  • If you do not receive your email results in a few minutes, check your spam filter.
Email Results

Exporting Results - Citations Management

Citations management
Citations Management is only available from the Your Selections page. You must select results you would like to export into a citation manager from the main set of results, then visit Your Selections.

 

 

You may export your selected results into your preferred online management system or to your desktop in RIS format.

Your citation manager should automatically display the results downloaded.

Print Results

The Print icon option allows you to print selections from the Your Selections page, or directly from your main results page.

Source Status

Source Status
The Source Status link will present a dialog log showing the responsiveness of each separate source. The Check markindicates that the search at that particular source completed successfully; the Unresponsiveindicates that the source was unresponsive.

Spelling Suggestion

Science.gov will suggest words and phrases when a misspelling is detected. You'll see this in the upper left corner of the results page. Simply select the suggested term and a new search will be performed with the corrected query information.

Search Tips

Queries can include:

  • Multiple terms (AND is the default)
    • Example: A search on frogs toads will return results on both frogs and toads

  • Expressions using logical operators AND, OR or NOT
    • Example: A search on frogs AND toads will return results where both frogs and toads appear; frogs OR toads will return results where either frogs or toads appear; frogs NOT toads will return results with frogs and without toads.

  • Phrases, contained in double quotation marks
    • Example: a search on “nitrate cycling” will return results where the term nitrate is immediately followed by the term cycling.

  • Parentheses, requiring the expression within to be evaluated first

  • Wildcards

    • Use * to search for the term with 0 or more additional characters
      • Example: nucle* will return results with the terms nuclear, nucleus, nucleoprotein, etc.

    • Use ? to search for the term with only 1 additional character (characters include numbers, letters and punctuation)
      • Example: DO? will return results with the terms DOE, DOI, DOT, DOG, etc.

    • Searches are not case-sensitive
      • Example: RAIN, Rain and rain will produce the same results

Need more Science Information?

Check out our Explore Selected Science Websites by Topic, beginning on the home page: Although portions of these websites and databases are automatically searched with your keywords, you may want to explore by selecting a specific topic. We can send you directly to your website of interest. Simply select the back button to re-enter Science.gov. Or, browse through the tree by subject, narrowing your topic as you select.

Don’t miss our Featured Websites: Located at the bottom of our home page, these are popular science sites, and rotated regularly.

Our searches are powered by Distributed Explorit from Deep Web Technologies. Our results may include full text, bibliographic citations, and other types of material from federal agencies.