Kryptonians had been locked in a deadly war with the Martians, shape-shifting aliens from Ma’aleca’andra. The Kryptonians believed that the war was theirs, but the treacherous Martians discovered the knowledge machine known as Brainiac roaming their spaceways. The Martians led Brainiac back to the Kryptonians’ home planet of Krypton Krypton), and the techno-titan proceeded to absorb the planet’s data and convert its mass into energy for him to consume. Unable to repel Brainiac, the capital city of Kandor and all of its residents shrunk themselves down and escaped the planet in a rocket-propelled capsule. In modern times, the shrunken city and all of its Kryptonian inhabitants, sustained by an artificial, miniature yellow sun, are being looked after by the Super-Soldier Superman a human hero with the powers of a yellow sun-altered Kryptonian, until they can find a new habitable planet so they can un-shrink themselves.
