Flash flood warnings were issued by the National Weather Service in Tucson on Wednesday, July 15, for Pima and Pinal counties, including Biosphere 2.

Add Yahoo as a preferred source to see more of our stories on Google. A page from the Deseret News on Sept. 26, 1991, as the eight "Biospherians" entered their enclosed life biosphere in Oracle, Ariz.

Biosphere 2 first became famous as the human experiment of the 1990s that sealed a group of eight researchers inside its 3 acres of diverse ecosystems for two long years. The goal was to experiment ...

Biosphere 2 was a highly ambitious experiment to simulate a self-sustaining Mars colony in the Arizona desert. Eight men and women locked themselves inside for 2 years and experienced one incredible ...

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 ...

Editor’s note: This is the first part in a two-part series detailing developments in the UA’s operation of Biosphere 2. The UA looks to tackle “”grand challenges”” and inform the public about science ...