TED Video: Living in a small biosphere

This is an awesome talk by a TEDster in University of Southern California. She lived in a small biosphere untouched with the outside world for more than 2 years with 7 other people. Planted, cooked, and made their own food without access to the things outside of the biosphere, just to test the idea of the possibility and practicality of living in a biosphere - say for example, built on the moon or mars.