We recently added Science.gov to our Libguide of free resources. Science.gov not only serves as a gateway to more than 42 scientific databases and more than 2000 scientific websites from organizations with 14 federal science agencies, it also finds science images. Images include animal and plant, weather and space, and earth and sun images and more. No registration is required. To search for images, merely select the Image Search link under Special Collections (bottom right).