Dr. Nelson will be featuring his book Pushing the Limits:  Insights from Biosphere 2.

Pushing Our Limits is a fresh examination of Biosphere 2, the world’s first man-made mini-world, twenty-five years after its first closure experiment.  Author Mark Nelson, one of the eight crew members locked in the enclosure during the 1991–1993 experiment, offers a compelling insider’s view of the dramatic story behind Biosphere 2.