With a lifetime dedicated to the study of life on Earth, E.O. Wilson tells Bill Moyers what humankind needs to understand in order to save the planet.

Dedicating his life to the exploration of life on Earth, E.O. Wilson is one of the world's foremost authorities on biology. BILL MOYERS JOURNAL profiles the author of 25 books and the recipient of two Pulitzer Prizes, who speaks about what humankind needs to understand about the Earth to heal it and about his latest project "The Encyclopedia of Life"- a digital, online catalog of every single living species on the planet. "With ... new technology we are prepared to explore the living world and add a new dimension to biology,"says Wilson. "We are the brains of the biosphere. We are the ones that finally, after four-and-a-half billion years of evolution, actually developed enough reasoning power to see what's happening."