Tim Burton, see me after class for copying someone elses' work!
This has to be the inspiration for Mars Attacks, the spinning saucers, translating the alien language, the saucers flying over the cities and landmarks of the world, especially the Washington Monument scene, the Death-Ray the saucers use, even the way the saucer-men are beaten in the end. If you've seen Mars Attacks, you need to see this as well.
The big difference being though, that this film isn't a comedy. Well, not intentionally, the usual 50's Sci-Fi bad acting, laughable dialogue and ridiculous costumes are all there, but this film has an ace up it's sleeve, the hero of the film. Not the lead actor, oh no, the special effects guy.
Ray Harryhausen's effects make this film 10 years ahead of it's time. People are knocking out less convincing animation today, the guy is a genius in his field. Also the direction has quite a 'modern' feel to it, the story flows like something from the 90's rather than the 50's, perhaps helped along by the way Harryhausen shoots his scenes, his lighting and timing are spot on.
These two elements make this film stand head and shoulders above its contemporaries, it's 50's Sci-Fi, B-movie trash for the thinking man.