Garden world

A garden world was a type of planet or moon that was capable of giving rise to native life forms. Garden worlds were characterized by proximity to their parent star, the type of star that they orbited, and other characteristics such as a nitrogen/oxygen atmosphere or the presence of surface gasses that could become such an atmosphere. A garden world could exist in three separate dstages:


 * Pre-garden: Worlds in this state had the capacity to develop life, but had not yet done so. Terraforming could accelerate the process.
 * Garden: Worlds in this state had already given rise to some form of native life, whether it be single-celled bacteria or entire ecological systems including the evolution of sentient species.
 * Post-garden: Worlds in this state had already developed an ecology, but for various reasons were experiencing a drastic decline. This included intervention by sentient species, whether native or from elsewhere.

Appearances

 * The Great Leap Forward