ORACLE, Ariz. — Plopped in the Sonoran Desert, just outside Tucson, Ariz., sits a massive, multilevel greenhouse that's probably best known as the inspiration for a Pauly Shore movie. A slick, stepped ...

Most days, you’ll find Joost van Haren tromping through Arizona’s only tropical rainforest. An assistant research professor at the UA, van Haren works in the rainforest at Biosphere 2—in the middle of ...

Pinyon pine trees at the conclusion of the Biosphere 2 experiment. The tree left was kept 4 degrees Celsius warmer and died weeks before the drought-stressed tree kept at ambient temperatures, right, ...

Nestled in the foothills of the Catalina Mountains, around 31 miles from Tucson, there exists an oasis; a collection of environments one would never anticipate to exist in the scorched Arizona desert.

Ecologists studying the tropical forest biome in Biosphere 2 near Tucson, say it is very similar to being in a natural rainforest. Credit: Chris Richards/University of Arizona PHOENIX – Step inside ...

Step inside Biosphere 2’s tropical rainforest, which thrives beneath an enormous glass dome, and visitors are met by a wall of warm humidity and lush greenery. The sprawling complex north of Tucson ...