So you want to colonize Mars. Well, Mars is a long ways away, and in order for a colony to function that far from Earthly support, things have to be thought out very carefully. Including how many people are needed to make it work.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/thebareminim.jpg)
Source:
https://phys.org/news/2020-06-minimum-martian-settlers-survival.html