Selected Internet Resources --Government Resources for Science Images
"Most images are protected by copyright and cannot be reproduced without permission from the copyright owner. The exceptions are U.S. Government images, which generally are in the public domain and free from copyright.

Even though the following image sources are from government Web sites, it is always good practice to make sure that the image is not protected by copyright. One way to do this is to look for the artist credit and copyright symbol (©). If there is a copyright symbol, ©, and a date (©2002) then that image is protected by copyright. If you wish to use a copyrighted image, you will need to seek permission from the copyright owner. Once you are ready to use an image, be sure to include image credit and source.

The Internet resources below are organized by broad scientific classes. Since many of these sites are interdisciplinary in nature, there may be some overlap.

For a complete list of Government image Web sites, see the USA.gov graphics list