Indeed. Slightly tangential, but when you start thinking about a Mars colony -- but here on Earth -- a self-sufficient hermetically-sealed environment somewhere underground -- it really starts to drive the scope of the problem home.
We don't really know how to create a self-contained ecosystem here on Earth, with everything on-hand. And the residents won't even all die if someone accidentally pokes a hole in the wall in the Antarctic prototype base.
We don't really know how to create a self-contained ecosystem here on Earth, with everything on-hand. And the residents won't even all die if someone accidentally pokes a hole in the wall in the Antarctic prototype base.