Remember when scientists made a thing called “Biosphere 2”? It was this enclosure that theoretically behaved the way the Earth (a.k.a. Biosphere 1) did, but in a smaller, totally isolated, idealized way, controlled by the scientists. Under the best case scenario, it would be exactly like the Earth it sought to replicate, except without any factors they couldn’t control. It didn’t work very well at all and fell apart pretty fast.
Not sure what reminded me of that. Oh yeah, and my college roommate made a thing called “Pornosphere 2” but it was different.