Peoples of the Solar System: Mars, Part the First

Hello again, and welcome to our next stop on our xenanthropologic tour of the Solar System: scenic Mars, home to more varieties of sentient life than any other world in the known universe. We'll be stopping here for quite some time, and rest assured: we will be returning.

As always, click to embiggen or you will miss all of the jokes. PLEASE READ THE JOKES.

EDIT: You might ask where the Greater Martian Skeptic might be found, since there is no handy line pointing out their homeland. Sadly, the Skeptics of Mars have been driven from their homes by members of more credulous and short-tempered species from adjoining regions. Please donate to the Skeptical Relief Fund today.