Theoretically, the idea of colonizing and inhabiting Mars seems reasonably achievable, but practically it is far stretched.
Astronauts would probably be genetically tweaked to lose the stress and fear response so that they would remain calm.
Finer-scale, dendritic networks of valleys are distributed across considerable swaths of the topography elsewhere on the Martian surface.
The controversy regarding the colonization of Mars is a long one. It is recorded that