 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.The people now known as the Daxamites were originally Kryptonians who left their homeworld to explore the universe (in post-"Crisis on Infinite Earths" continuity, the Eradicator, an artificial lifeform programmed to preserve all Kryptonian culture, altered the birthing matrices ("artificial wombs") that the explorers took with them so that all newborns would be fatally vulnerable to lead and other materials such as greenhouse gases and certain rocks).