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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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A cluster of 20 gold atoms on a thick magnesium-oxide bed shows a good amount of charge accumulation (pink) and depletion (light blue). The attraction causes the cluster to collapse. For complete caption see bottom of story.