Look at this amazing shot:
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The author then examines close-ups like this one, "clearly showing" square-walled architecture:
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Inspiring stuff for SF writers! Wacky, too, but hey - it's SF! We can use material like this for cool settings. Unfortunately, NASA debunks the argument that Iapetus is a manufactured world. (But of course they would! The Man is in league with the aliens!)
Thanks to
Best,
Chris