The population is over one one billion, and consists of all kinds of sentient life. In F-Zero GX, Mute City is known as a "Metropolis in the Heart of the Space Federation" and the information link for the entire universe. It is also regarded as the most advanced and sophisticated city in the universe. In the future, Mute City is replaced by Bianca City as the center of economic, political, and cultural activity in the galaxy, due a large deposit of pure titanium being discovered. It is also stated in the original ''F-Zero'' manual that Dr. Stewart is from Mute City.