Mars to Stay to 30, thereby beginning a Martian settlement. Since the Martian surface offers all the natural resources and elements necessary to sustain a robust, mature, industrialized human settlement—unlike, for example the Moon—a permanent Martian settlement is thought to be the most effective way to ensure that humanity becomes a space-faring, multi-planet species. Through the use of digital fabricators and in vitro fertilisation it is assumed a permanent human settlement on Mars can grow organically from an original thirty to forty pioneers. A Mars to Stay mission following Aldrin's proposal would enlist astronauts in the following timeline: As Aldrin has said, "who
Monuments of Mars with rescuing NASA astronauts that have gone missing in the fictional "monuments of Mars". Toward the end of each episode, groups of captured astronauts can be released from "energy rings". At the end of the final episode, markings on a "face" object reveal that some aliens were using Mars as a base to study humans from afar, but abandoned it and left their automatic intruder capture system switched on, hence the capture of the astronauts. In the game, the player controls an astronaut who must navigate through twenty levels on the planet Mars to finish the game. Most levels require