The first Superboy story also updated the origin of Superman, and for the first time shows his father Jor-El as being aware that his son Kal-El would have powers on Earth that he does not have on Krypton. In this original story, years after his arrival on Earth, Clark Kent saves a man pinned under an automobile and subsequently decides to become the costumed hero Superboy. Clark appears to be a preteen in this story, and in his first story in "Adventure Comics", he actually celebrates his tenth birthday.