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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Stromatolitic ironstone full of bound iron. The bubble-like shapes come from bacterial action. An eon ago, oceans appear to have been full of ferrous iron, which would have facilitated production of N2O (laughing gas). Credit: Georgia Tech / Allison Carter
