Superman - The Last Family of Krypton #2

[superfangirl1]

Comments

[shanejayell]

It was canon for awhile that there was a bio-medical reason Kryptonians abandoned space flight, that they died if they left their planet. It was set up in the John Byrne reboot, dunno if it's still canon.

[freezer]

I think current canon is the DCAU version: Braniac discredited Jor-El out of self-preservation, so he (and Kal-El) survive while Krypton went boom. I think they threw in the "self-imposed exile" thing to explain why there were no colonies other than Argo.