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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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Earliest animals evolved in the mid to late Proterozoic Eon and lie deep in the fossil record. Depicted in the photo is an example of the Pteridinium genus. Credit: Douglas Erwin / National Museum of Natural History
