Board Thread:Questions and Answers/@comment-25069771-20140616130529

In the DC universe, I believe Kal-el, aka Superman was born on the prison planet Krypton. We know it's a prison planet because the inhabitants were sent there and can't get off. We know that they were sent there because they certainly didn't evolve there. Organisms that evolve in an environment aren't made weaker by it. Superman is weakened, even killed, by Kryptonite. He gains power from the _yellow_ sun of Earth, Krypton had a red sun. No Kryptonian had superpowers on Krypton, they all do here. Despite being far more technologically advanced than Earth the Kryptonians they never developed space travel. The reason? Clearly so that no member of their race can escape the prison.

But, I hear you say, wasn't Superman born on Krypton? So clearly he couldn't have been convicted and sent there. Yeah, because _the entire "Kryptonian" race was sent to that prison, which crippled them their entire life through, and countless generations were born on/in that prison. So either the "Kryptonians" were so hellishly evil that they had to be confined to a crippling environment for centuries (while their breeding was controlled by a computer that arranged marriages) or they just scared the HELL out of somebody. Somebody powerful enough to send an entire race of supermen to prison. 