Jazuur was a planet that, long ago, had mastered Nanotechnology to the point that it could instantly repair damaged infrastructure or even the Jazuurs themselves.
The micro-machinery kept all the people, the environment and the technology of the planet in balance by assimilating all aspects of its environment to build a template of the status quo, and then continuously maintain that norm. The system was so revered by the Jazuurs that when Brainiac shone his reducing ray on their Imperial City, they were not afraid.
Superman speculated that Brainiac was desperate to incorporate the Jazuurs nanotech into his own system to achieve immortality and indestructibility, and this was his driving force in bottling them.
A Nanotech node escaped the bottled city, and was unknowingly picked up by Superman with a suit of Kryptonian Armor from Brainiac's Skull Ship and brought to Earth, where its faulty program created fire and ice beings, and a deadly copy of Superman.
Little remains of Jazuur, as the Multitude -- though delayed by Super-Turtle -- wiped-out their population long ago; the bottled Imperial City exploded, and their sole surviving Nanotech nodes were thrown into the sun by Superman.
Points of Interest
- Imperial City, Nanotechnology
- In Superman (Volume 3) #6, Superman's psychic link to the Jazuurs' nanotech indicated that their bottled Imperial City destroyed itself, and then its remains were disintegrated by Brainiac. When Superman later threatened to destroy Brainiac's bottled worlds in Action Comics (Volume 2) #7, he seemed to be looking at a city from Jazuur. It could be an error, or another Jazuurs city.