UFOs (Unidentified Flying Objects) are mysterious objects seen in the sky for which, it is claimed, no orthodox scientific explanation can be found and which are frequently speculated to be extraterrestrial spacecraft.

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Looking for a story about UFOs coming from a civilization living beneath the sea floor

Can anyone identify a story about a submarine crew who wind up finding a civilization living beneath the sea floor? This civilization is a peaceful race who visit the surface in UFOs. They do not know ...
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Looking for a Japanese UFO Movie with a mission to Venus

This has been a old live-action movie from Asia, most likely Japan. I've seen it some time in the late 80's and I think it's been black/white only. Earth is invaded by UFOs (small and round, like ...