Gethen is a fictional planet featured in Ursula K. Le Guin's science fiction novel, "The Left Hand of Darkness." It is characterized by its harsh, cold climate and unique inhabitants known as Gethenians, who possess a distinct biological trait: they are ambisexual, meaning they can adopt male or female characteristics depending on their reproductive needs. The society on Gethen is influenced by its environment, leading to a culture that values cooperation and adaptability. The planet's political landscape is complex, with various nations, including Karhide and Orgoreyn, often engaged in diplomatic and territorial disputes. Gethen serves as a backdrop for exploring themes of gender, identity, and the nature of human relationships.