Tyler Volk traces James Lovelock's initial observation that in the search for life elsewhere, atmospheres may offer chemical signatures, which he applied to our own planet, to note the self-regulating cycles and feedback loops that help maintain Earth's adaptive, long-term stability. Our biosphere's various ecosystems, from the soil, ocean, and air are all regulated by living processes, are "biochemical guilds" that help the planet "breath" and  shape long-term dynamics in evolution. What role are we playing in our Anthropocene era?

Tyler Volk, Professor Emeritus of Biology and Environmental Studies at New York University, has "built math models for the cycling of elements in what were called "closed ecological life support systems (CELSS)" and his research in advanced life support helped NASA plan  systems that might someday keep astronauts alive on the Moon and Mars. His book is "Gaia's Body: Toward a Physiology of Earth."

From the Archives: This live interview was recorded on June 4, 2002 on the nationally syndicated radio program, hosted by Laura Lee . See more at www.lauralee.com

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