system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What's honestly keeping us from putting a human on Mars? Is it a simple lack of funding or do we just not have the technology for a manned mission at this time?
gpt
There is a few problems

* price
* getting there -> being shut in a capsule for many months is very bad for your mental and physical health
* landing -> our track record on that is not so super great with mars rovers
* staying there -> you need some concept to keep the people there alive (meaning: water, air, shelter, and nutrients), as shipping goods is absolutely prohibitively expensive.