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 ...

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.

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 ...

ORACLE, Ariz. — You won't be able to enter the rainforest on your next trip to Biosphere 2 in Oracle. It's closed because a drought is about to "hit" the rainforest. An extensive $2.1 million research ...

This segment is part of The State of Science, a series featuring science stories from public radio stations across the United States. This story by Melissa Sevigny appeared on KNAU. The world’s ...

After two months of controlled drought, Biosphere 2’s tropical rainforest is dancing in the rain once again. The University of Arizona’s Biosphere 2, located north of Tucson, is home to several ...