Yayoi Obata describes the formation of mammalian egg cells in vitro.

Interview with 2016 Cozzarelli Prize Winners Sandu Popescu and Jeff Tollaksen

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.