The use of digital images is often subject to copyright and/or licensing restrictions. Consult each site's information on rights and reproductions, especially if you plan to use an image in a publication. It is equally important that you cite images properly. See the "Copyright resources" and "Citing images" sections.
SpringerImages is a growing collection of scientific images that spans the scientific, technical and medical fields. The continually updated collection gathers photos, graphs, histograms, figures, and tables, and is available as a searchable online database. The SpringerImages interface enables users to search through captions, keywords, context and more, even jumping from the image to the source article. Users can create personalized image "sets " and can easily export images for use in their own presentations or lectures.
U.S. National Science Foundation Multimedia Gallery
A collection of images, video, and audio relating to the National Science Foundation's research in science and engineering
NOAA Photo Library
A collection of downloadable public domain photos, maps, and illustrations produced by the U.S. National Oceanic and Atmospheric Administration
AP Images is one of the world's largest collections of historical and contemporary imagery, with a 50 million-image print and negative archive. As an essential source of photographs and graphics for professional image buyers, AP Images strives to meet the needs of today's global customer through superior image quality, selection and service. Covers the major news events photographed from the 1840s to today.
Magnum Photos is a cooperative that provides photographs to the press, publishers, advertising, television, galleries and museums across the world. The Magnum Photos library houses all the work produced by Magnum photographers and some special collections by non-members. There are approximately one million photographs in both print and transparency in the physical library, with over 500,000 images available online. These images may be licensed for editorial and commercial use; they are not specifically licensed for academic use. All images are under copyright.