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• Just type in your key word(s), like "global warming", and select .
• You'll get results ranked by relevance, or grouped in a way most likely to match your search query. The higher the number of stars, the more relevant the document is to your query.
• You will also see Clusters of results on the left side of the screen. 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.
• You may

• You may set session Preferences on the navigation bar after performing your first search.
  
  

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. You can also select specific sources to search.

• Full Record will search the entire content of a document, when available.
  


• You may . This allows you to decide how the search operates between fields.


• 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. Select the to view individual sources for selection.
  


• runs the search.
  


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


• You can narrow the search by searching within the results of your original query. Enter a term in the box for Refine Results and select the Refine Results button.
• You can also initate a new search from the results page. Enter your search in the box for new search and click new search.
  
• 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.
  
  

More About Your Results

Clusters
• Under the heading Clusters, at the left of your results page, your results have been grouped into topics related to your search term.
• Clusters are also offered by year of publication.
• Clustering can help guide you to needed results by grouping result documents into meaningful groups.
• Just click on one of the topics or years, and you will see those results, also relevancy-ranked.

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

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

Emailing Results

• The Email Results link allows you to email a set of results to yourself, friends, or colleagues.
• Select Email Results, and enter the required information, indicated by red asterisk:



• You may select the number and format of the emailed results.
• This function is also available from the "Your Selections" page, where you can email specific, selected results.
• If you do not receive your email results in a few minutes, check your spam filter.

Summary of All Results

The Summary of All Results link will present a dialog log showing the responsiveness of each separate source. The indicates that the search at that particular source completed successfully; the indicates that the source was unresponsive. The number in the Ranked column indicates the number of results returned for Science.gov. The Available column shows how many additional results are available from that source.

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 click on 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 Help Navigating?

Once you have your results

• Select the linked title or icon to view a specific record or document OR select the check boxes beside the result to view in "Your Selections".
• "Your Selections" presents a list of results you marked during the current session.
• "Clear Selections" will delete all previous marks.
• You can use to view results by source.
• will take you back to your search results.
  
• To bookmark an item, click on the title to go to that direct web address.

Additional Features

Science.gov 5.0 will make your search results more relevant than ever.

• DeepRank operates behind the scenes to rank results using full-text of documents when available
  
• Refine Results option allows you to search within your original search to increase relevancy of your results
  
• Email Results option allows you to share science information and research results with friends and colleagues
  

Need more Science Information?

Check out our science by topic, beginning on the home page: Although 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.

CONTACT US

To interact with the Science.gov team, fill out our comment form.

Be sure to include your contact information. Select the appropriate government agency from the pull-down list, add comments in the comment box, and select the submit button. If you aren’t sure which agency you want, or if you have general comments, submit your info from the box under item #4.

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Additional questions may be sent to webmanager@science.gov.

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