Bob MacCallum explores how music can evolve from noise based on listeners' preferences.

Interview with 2012 Cozzarelli Prize Winners Clayton R. Magill and Katherine H. Freeman

Welcome to Science Sessions, the PNAS podcast program. Listen to brief conversations with cutting-edge researchers, Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in PNAS, plus a broad range of scientific news about discoveries that affect the world around us.