I remember the Biosphere experiments from grade school. I remember it as an exercise in my imagination; if we could create a habitat artificially, and if people could inhabit such a space peaceably, what might be accomplished with this technology off-world. I don't remember how it failed, or why it failed. I do remember learning that it failed, and grieving it. Now there is the internet, and I am an adult... I should research that.

How times change, and our minds--occasionally--with them.