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Events
The Great Race of Yith, fleeing catastrophe on their homeworld, transmitted their minds into a race of cone-shaped creatures on Terra. They drove the Flying Polyps underground and imprisoned them there. Following that war, they built their first and greatest city, Pnakotus.[1]
In the Permian period, Eryops, the last common ancestor of cold-blooded and warm-blooded organisms, lived on Terra.[2]