The globe (and the Superman story in general) says that Clark is the last of his kind. Even in the movie no one believed Jor-El that Krypton was exploding. That was what always bothered me. I mean if the Kryptonians believed him he himself would've allowed himself to be saved right? I never really liked the villians in this case were so uninspired though I loved the fact that Lois actually met someone who was worse in the kitchen than she was. I wonder that if Clakr hadn't been busy with duelling practice would he have noticed too?