@FrankN.Stein: Actually , in th eearly shorts he was still "leaping" and not technically flying. But then, as the series proegressed, the animators found that having to draw Superman crouching down and pushing off from the ground was time consuming (and costly). They thus petitioned the powers that be at National…

@GirlLibrarian: I agree. The issue is not that the Earth will care whether our climate is suitable for us. I, on the other hand, do care if our climate chnages to quickly.

@WatchingPreacher: The real beauty is that any continuity errors, as occur in all films, will be interpreted as clues!