Another early Terran colony world, Zwen's rate of planetary rotation is so slow that its nights are over six Earth months long. Early colonists were driven nearly insane by the endless nights. This lead to a biogenetically engineered mutation that enabled the people to effectively hibernate through these long and dark months. Since Zwenwas a world filled with natural predators, this mutation acquired the protective feature of being able to turn the body to a stone-like consistency. Zwenian culture soon developed around these long hibernations, great pride being taken in an individual's ability to partake in long periods of unconsciousness. Few natives possess the desire to leave Zwen, although their natural ability to spend extended periods in hibernation have put them much in demand for deep space exploration.