I dunno about Mars, but I worked at a reputable Observatory and much to my surprise discovered that one of the astronomers believed that the moon was inhabited by a race of moon men who live inside the moon. And only come out when you're not looking. He was dead serious about it. Of course, I noticed that at about the time he developed this theory he started wearing his pants backward. The man wanted to do a public planetarium show exposing the inner core of the moon. Ya never know. Don't you just hate aliens that only come out when you're not looking?

Jerry