Biosphere 2 was built from 1987 to 1991 in Oracle, Arizona. In 1984 the site was purchased by Space Biospheres Ventures and, in 1991, the first Biosphere 2 crew quarantine mission began.

The structure reaches 91 feet at its highest point, covers more than three acres and contains 6,500 windows. The Biosphere 2 ...

Biosphere 2 is operated by the University of Arizona and remains a key hub for climate research. Tours are available every day from 9 a.m. - 4 p.m. with adult tickets starting at $29. Check it out ...

Biosphere 2 once hosted radical experiments for a self-sustaining ecosystem. During COVID-19, visitors can "tour" the living lab from their cars.

In this July 31, 2015 photo, several of the main buildings of the Biosphere 2 complex, including the tropical rainforest, left, the technosphere, middle, and the south lung, right, are shown as a ...

Because of Biosphere 2, we now know what not to do on Mars and elsewhere. Don’t mix your farm area with your living space; keep it in a separate dome. Don’t rely on plants to supply all your ...

To get to the nearest rainforest, from Tucson, that is, head up Oracle Road/Arizona Highway 77 and drive north for 24 miles. Next, at milepost 96.5, turn right onto Biosphere 2 Road. There you ...

In 1991, Biosphere 2 captured the imagination of the world. A crew of eight "Biospherians" clad in vaguely "Star Trek"-like uniforms ceremoniously marched through an airlock and into their new ...

Biosphere 2’s rainforest is part of an experiment designed to shed light on how tropical ecosystems will fare under the stress of a hotter, drier shift in climate.

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 ...

Exploring Biosphere 2: Arizona’s most unique science experiment. Posted: February 18, 2025 | Last updated: April 29, 2025. Arizona is home to one of the most unique science experiments in the world.