Multimedia Gallery
October 27, 2010
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
Close-up of a sample of 2.7 billion-year-old iron formation from Zimbabwe; red is hematite.
Close-up of a sample of 2.7 billion-year-old iron formation from Zimbabwe; red is hematite.
Credit: Lyons Lab, UC-Riverside
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
Also Available:
Download the high-resolution JPG version of the image. (139 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.
Related story: New Evidence Supports Snowball Earth as Trigger for Early Animal Evolution