Biosphere 2 PLUS 15

Fifteen years after living inside a terrarium in Arizona, some participants reflect on the experience and the experiment.

Space Survival

A team of University of Arizona scientists use hydroponics ?a self-sustaining watering system ?to grow plants in a greenhouse designed for Mars.


Congress is giving the Department of Homeland Security the right to waive environmental laws in their efforts to secure our country's borders. The move may impact endangered animals and the management of other species.