Lego Space Altair, Centauri, Antares, Canopus, Pollux, Vega, Arcturus, Cassiopeia, Mizar, and Rigel. "Mars Mission" is the second space theme to feature both humans and aliens and is a reboot of "Life on Mars". Unlike "Life on Mars", the aliens (a different breed of Martians) and humans were pitted against each other as children had been fond of doing with the original line. Space Police III continued the Lego trend of humans (or at least human-looking) versus aliens started in the former Mars Mission theme. This is the first time the Space Police have been pitted against monstrous looking aliens instead of
A Princess of Mars the planetary romance had become very popular in the emerging science fiction pulp magazines. The novel can also be classified as the closely related genre sword and planet, which consists of what are essentially sword and sorcery stories that take place on another planet. "A Princess of Mars" is widely considered to be the archetypal novel of the sword and planet genre. The novel also shares a number of elements of Westerns, such as desert settings, women taken captive, and a climactic life-or-death confrontation with the antagonist. Burroughs employs a literary device for "A Princess of Mars" to which he