In the early 1990s, eight people agreed to vanish from the world and live for two years inside a sealed glass habitat in the ...

From a distance, Biosphere 2 emerges from the cacti and creosote of the Sonoran desert like a gleaming oasis, a colony of glass and bright white structures. Despite being just outside Tucson, Arizona, ...

Biosphere 2 started with eight scientists and a very ambitious experiment. Now, almost 35 years later, it's still being used for cutting-edge research. Scientists continue to use it to study Earth's ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.