Usually, desert worlds prove to be a harsh environment for life, due to the small quantity of water or other liquids. While most of them are completely lifeless (Mars, Sagan III...) or inhabited by a few specialized organisms (Geonosis, Spheron I,Titania...), some actually have a prosperous environment and are inhabited by many different species that need little or no water (Tatooine, Darwin IV, Gobi,...).