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1. Overview: When it comes to evidence for artifacts on Mars, people divide into two categories: those who find scientific analysis more convincing than imagery; and those who find the reverse to be true. Here, we present evidence that may appeal to both categories.

Images 2-12 deal with statistical proof that at least one Martian surface feature, the 'Face' on Mars, is artificial.
Image 13 shows one of the better examples of a suspected artifact anywhere else in the solar system than on Earth or Mars. Later improved imagery showed it likely to be a natural object.
Images 14-52 show images of possible artifacts on Mars of the character that, if seen on Earth, they would immediately be categorized as the products of large-scale biological, and in many cases human, activity.
Images 53-55 give our primary conclusion and some speculative implications.