For those of you who saw the Death Battle, you know how powerful Superman can be. If not, link is above for you to find out. (skip to 8:46 for his stats) But I've found a continuity error. If Kryptonians really are that powerful, then how come a measly planet implosion/explosion killed off most of their race? I understand that they lived under a Red Sun, but they were technologically advanced. Couldn't they have evacuated their population to a yellow star?