We are visiting David and Donna today in Oro Valley near Tucson, Arizona. This morning, David and I went to you the famous Biosphere 2 facility, now owned and operated by the U of Arizona Science College. Here are a few shots of this amazing structure.
I picked up a couple of books to learn more and am eager to find out more about the 1991-1993 "human experiment" that took place then with eight individuals sealed inside for the duration.
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