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Sagan, Sagan 4 and Mason
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Sagan 4

Sagan 4 is an alien planet ecosystem project originally started by Hydromancerx inspired by Carl Sagan's video. Life on this alien planet started from a single-celled organism. It is now populated with many species of flora and fauna all created by artists who love drawing and xenobiology. Submissions take place on the Sagan 4 main forum.

Main Project
Biomes Ecosystems Generations
Species Taxonomy Weeks

Project Extra
Anatomy Awards Biochemistry
Cladograms Climate Dioramas
Disasters Disorders Food Webs
Geologic Timescale General Landmarks
Size Solar System Template Wizards


Sagan 4 is a planet with conditions similar to Earth. All of its life derives from a single cell, Protosagania. Its major kingdoms are:

  • Binucleozoa, an incredibly diverse group in which each cell has two or more nuclei, ranging from fish-like descendants, to insectoid-like fauna to the a wide range of Crystal Flora
  • Carpozoa, fauna with wide ranging morphological differences thanks to genomic instability and a tendency towards Earth-like faunal forms
  • Mancerxa, the largest kingdom, with a diverse range of fauna descended from green, photosynthesizing ancestors
  • Phoenophyta, purple photosynthesizers that include clouds of microbes in the oceans and some of the first flora on land.

...and plenty more! Feel free to dig through the current Ecosystem Page to see all of the intact species and environments.

Below is a random selection of extant species; click any one of them to learn more!

Or, for some per-category introductions, click one of the following :

Introduction to Extant FaunaIntroduction to Extant FloraIntroduction to Extant Microbes
(note that they are a work in progress)

Quick Category Links:

Living Species - Extinct Species