Glykan
Glykan is a hypothetical planet featured in the novel "Dune" by Frank Herbert. It is not a primary setting like Arrakis or Caladan, but it is mentioned in the context of the Imperium's history and political landscape. Glykan is described as a world that underwent significant environmental transformation, shifting from a lush, fertile planet to one facing a severe ecological crisis. This transformation is often used as a cautionary tale within the "Dune" universe, illustrating the potential consequences of unchecked industrialization or environmental mismanagement.
The specific details of Glykan's history and its inhabitants are not extensively elaborated upon by Herbert.