Is the BIOSPHERE still in Arizona somewhere?
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I always wanted to see the place they did that experience a long time ago. So is it still there or have they tore it down? Thank you!

Guess I’m wrong but I thought I read it was sold and not open to the public
http://www.b2science.org/index.html
Yes, it is and this site will tell you all you need to know about it.
It’s located in Oracle, Arizona, a little north of Tucson.
It’s still there, it’s just outside Tuscon