Summary: Xavier Le Pichon is one of the world's leading geophysicists who helped discover plate tectonics. Krista Tippett spoke with him on June 4, 2009 from the studios of APM in Saint Paul, Minnesota; Xavier Le Pichon was in a studio in southern France. This interview is included in our show "Fragility and the Evolution of Our Humanity." Download the mp3 of the produced show at on-being-dot-org.
