Editing Krypton (comics) (section)

====Survivors====
A Silver Age Superman was not alone in the survival of Krypton's destruction, being joined by his cousin [[Supergirl (Kara Zor-El)|Supergirl]], the [[Phantom Zone]] criminals, [[Krypto|Krypto the Superdog]], [[Beppo (comics)|Beppo the Super-Monkey]], a juvenile delinquent named [[Dev-Em]], the entire population of the city of [[Kandor (comics)|Kandor]], Supergirl's biological parents, and even Superman's biological parents (in hibernation on a space ship - ''Superboy'' #158 (July 1969)), although it was discovered that they actually died from lethal radiation. When the planet exploded, one entire city of Krypton, Argo City, survived the cataclysm.

Argo City drifted through space on an asteroid-sized fragment of Krypton, which had been transformed into [[kryptonite]] by the explosion. The super-advanced technology of its Kryptonian inhabitants allowed them to construct a life-sustaining dome and a [[lead]] shield that protected their city from the kryptonite radiation of the asteroid. The protective shield was destroyed in a meteor storm, exposing the inhabitants to the deadly radiation.

The sole survivor of Argo City, [[Supergirl (Kara Zor-El)|Kara Zor-El]], was sent to Earth by her scientist father to live with her cousin Kal-El, who had become known as Superman. Kara adjusted to her new life on Earth and became known as Supergirl. It was later discovered that Supergirl's parents had survived in the Survival Zone, a parallel dimension similar to the Phantom Zone, from which she released them. When the bottle city of Kandor was finally enlarged on a new planet that was similar to Krypton, Supergirl's parents joined its inhabitants to live there.