Re: Why did spock end up in the alternate universe?? that's all very confusing, because in 2233 kirk had moved to tarsus 3 (the conscience of the king), what suggest he must have been born earlier. even if the tos episode got that wrong, it's established that kirk was born in iowa. what was kirk's mom doing aboard the kelvin? how did nero manage to alter happenings before his arrival? it's not so that nero's attack triggered the birth, he made short work of the kelvin.