Assertion: krypton's sister planet | /r/CapableOf | knock out by the planet's explosion
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text: Kara In-Zee, alias Supergirl, is the lone survivor of Argos, Krypton's sister planet knocked out by the planet's explosion; however, in the Justice League Unlimited episode "Fearful Symmetry", Doctor Emil Hamilton, who has examined Superman, calls her DNA "Kryptonian", indicating that Argosians are genetically related to Kryptonians.