Kara Zor-El is the daughter of Superman's uncle Zor-El and aunt Alura In-Ze. Kara was born before Superman; she was a teenager when he was a baby. She had been sent in a rocket in suspended animation to look after the infant Kal-El; however, her rocket was caught in the explosion of Krypton, became encased in a kryptonite asteroid, and she arrived on Earth years after Kal-El had grown up and became known as Superman. Due to this extended period of suspended animation she is "younger" than her cousin.