It has long been argued that Supergirl is actually more powerful than Superman, since she spent more time in space absorbing the rays of Earth’s yellow sun upon her trip to Earth. And while the validity of that stance remains to be seen, it is true that Supergirl has one invulnerability that makes Superman look like an absolute weakling.
Kara Zor-El or Kara Danvers aka Supergirl is Superman’s cousin who spent most of her early life on Krypton before the planet came to a cataclysmic end. Kara was sent to Earth in similar fashion as her baby cousin when she was a teenager, but while Kal-El’s trip was a straight-shot to Earth, Kara experienced unforeseen detours which caused her to arrive on Earth far later than Kal. When she arrived at her destination, Kal-El was already an adult and was well into his career as the world-renowned superhero, Superman. Following his lead, Kara took on the mantle of Supergirl and joined her cousin on his quest to protect the Earth from any threat it may face.
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In Supergirl #25 by Kelley Puckett, Drew Johnson, and Lee Ferguson, Kara is running simulations of world-ending events to better prepare herself in the likelihood something like what she’s training for actually happens. As if due to tempting fate, Supergirl is later attacked by a villain named Reactron who launches an assault against her by shooting Supergirl with a powerful blast akin to a nuclear bomb. While she is knocked down, Supergirl is far from out of the fight and even seems as though she was barely phased by the explosion.
Supergirl’s reaction to basically being hit with a nuke proves how much tougher she is than Superman, at least in that regard. Superman has
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