Board Thread:Fiction Universe Discussion/@comment-24096264-20151010141826

Are there any good in-universe reasons that an interstellar species could just vanish from a galaxy? Or could they just be voided completely and have no in-universe reason for their removal? I ask because I have been considering removing the Celophicix from the Borealis galaxy since they have not done anything or interacted with any other race to date. The article could also benefit from being re-done completely, which would be easier if the species was "started over." 