In this special two-part podcast Ariel Conn is joined by Max Tegmark for a conversation with Dr. Matthew Meselson, biologist and Thomas Dudley Cabot Professor of the Natural Sciences at Harvard University.

Part Two focuses on three major incidents in the history of biological weapons: the 1979 anthrax outbreak in Russia, the use of Agent Orange and other herbicides in Vietnam, and the Yellow Rain controversy in the early 80s. Dr. Meselson led the investigations into all three and solved some perplexing scientific mysteries along the way.