Is Iapetus Artificial?

The pictures below show Iapetus, one of Saturn's moons. There are some very startling features of this moon that are hard to explain as natural features. This website goes into great detail discussing the anomalies and what they might mean.

The general idea is that the 12 mile high, 800 mile long equatorial ridge must be an artificial construct. Further evidence is presented that the moon is not round, but faceted, as if it were geodesic structure. The arguments presented on the website are fairly persuasive- there is something very strange about this moon. Extreme blowups of some photos purporting to show smaller artificial structures on this moon are not persuasive and actually detract from the stronger arguement that this moon may be an artificial satellite or spaceship.

It is certainly a science fiction idea, but who knows, it might be true. On the other hand, do we really understand nature so well, as to rule out natural explanations. I think we may be hearing more about this moon in the future.