Anchorhead said:
Regarding Luke and Leia; Their ages and proof they were never meant to be related.
From the shooting script for Star Wars:
EXT. TATOOINE - DESERT WASTELAND - DAY
A death-white wasteland stretches from horizon to horizon.
The tremendous heat of two huge twin suns settle on a lone
figure, Luke Skywalker, a farm boy with heroic aspirations
who looks much younger than his eighteen years.
----------------------
INT. REBEL BLOCKADE RUNNER
Threepio stands in a hallway, somewhat bewildered. Artoo is
nowhere in sight. The pitiful screams of the doomed Rebel
soldiers can be heard in the distance.
THREEPIO
Artoo! Artoo-Detoo, where are you?
A familiar clanking sound attacks Threepio's attention and
he spots little Artoo at the end of the hallway in a smoke-
filled alcove. A beautiful young girl (about sixteen years
old) stands in front of Artoo. Surreal and out of place,
dreamlike and half hidden in the smoke, she finishes adjusting
something on Artoo's computer face, then watches as the little
robot joins his companion.
Yeah, as I said, originally Luke and Leia definitely were not twins.
The question of them not being related, however, may be another story entirely...
...have you ever seen Der Ring des Nibelungen?