Visualizing Science

CDC’s Public Health Image Library
VisualDx: (point-of-care visual diagnostic decision support system that includes more than 17,000 medical images and illustrations)
Flickr Commons
Pixabay
The Getty Open Content
USGS: U.S. Geological Survey Photographic Archive:
-Maps, Imagery, and Publication
-Multimedia Gallery
NIH: US National Library of Medicine

Good Links:

Popular Science
Nasa
Discovery
Live Science
Science Daily
Scientific America
Space
Science Magazine
Smithsonian
Tree Hugger