There are many things humanity must overcome before any return journey to Mars is launched.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/howtogetpeop.jpg)
Source:
https://phys.org/news/2020-12-people-earth-mars-safely.html
Only the Autodidact is Free
There are many things humanity must overcome before any return journey to Mars is launched.
Source:
https://phys.org/news/2020-12-people-earth-mars-safely.html