@ectomike1: From the outside, it looks like one giant building... but inside are multiple worlds. Rainforests, an ocean, a desert, farmland, and the living quarters where eight people spent two years sealed inside one of the world's most ambitious scientific experiments. Some places preserve history... others challenge it. Biosphere 2 did both. #Biosphere2 #Arizona #ScienceTok #HistoryTok #ExploreArizona @Graves