
PNAS Science Sessions
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.
Latest episodes

Nov 9, 2020 • 22min
Supernova and mass extinction
Brian Fields explores a hypothesis that a supernova may be responsible for a mass extinction.

Oct 26, 2020 • 24min
Future of artificial intelligence
Eric Horvitz discusses AI’s promises and perils.

Oct 12, 2020 • 17min
Origin and diversification of penguins
Juliana Vianna and Rauri Bowie explain the origin and diversification of penguins.

Sep 28, 2020 • 17min
Economics of Greenland ice sheet melting
William Nordhaus explains the economic consequences of Greenland ice sheet melt.

Sep 14, 2020 • 17min
Military conscription and public sector employment
NAS member Dalton Conley explains how the Vietnam War draft lotteries are a natural experiment for studying how military service affects life outcomes.

Aug 31, 2020 • 17min
Transitions tied to early farming
Clark Larsen describes the costs of urban life a Neolithic city.

Aug 17, 2020 • 15min
Soil bacterium that lives on air
Mette Svenning and Alexander Tveit describe a bacterium that can live on gases in the air.

Aug 3, 2020 • 15min
Exploring bivalve shell design
Derek Moulton explains the mathematics behind bivalve shell design.

Jul 20, 2020 • 17min
Origins of the kinetochore
Eelco Tromer and Jolien van Hooff explain the origins of the kinetochore in eukaryotic cells.

Jul 6, 2020 • 16min
Breaking the STEM ceiling
Fabiola Gianotti, Marcia McNutt, and Donna Shalala discuss the past, present, and future of women in STEM.