Once you enter
1. Select the topic what might contain the information you are seeking. Click on the topic.
2. You will be taken to another page that will help you to narrow down your search. Click on the topic.
3. You will be taken to a site that might contain the information that you are seeking. Use the Search box if it is available. Enter a keyword and click on Search or Go. An Index might have a listing of information about your topic.
Go to science.gov