[spacenick88]

I'm such a space enthusiast and I'd absolutely love a Biodome 3. That said, I think that people tend to confuse "sustainable colony" and "self-sustaining colony". If it ever comes to it, we will have a sustained presence on Mars for decades before it becomes self-sustaining. That said even with supplies from Earth a Mars base will need a lot of sustainability tech that can be applied on earth too.