Proterozoic Eon
Representing the "middle period" of the life-history of a Gaian Type world, with life mostly still at the microbial level. During this stage of planetary evolution, the atmosphere changes from reducing to oxygenated, the modern regime of continental drift begins, warm conditions replaced by "Snowball Earth", following that the short-lived Edicarian biota and the appearance of first metazoa (multicelluar animals). While the Earth was passing through it's Proterozoic stage, elsewhere in the galaxy, the Archivists, Mruta, Jacks, Halogenics, and very probably other significant xenosophont empires all arose and disappeared.
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Development Notes
Text by M. Alan Kazlev
Initially published on 19 December 2001.