
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

Aug 19, 2019 • 14min
Interfaces and Mixing
A collection of research articles explores developments in interfacial transport and mixing, with wide-ranging practical applications.

Aug 5, 2019 • 6min
Origin of sunflower family
Jennifer Mandel outlines the evolutionary history of the sunflower family.

Jul 22, 2019 • 8min
Nutrients and Chesapeake Bay recovery
Jonathan Lefcheck and Robert Orth discuss nutrient pollution and recovery in the Chesapeake Bay.

Jul 8, 2019 • 6min
Physics of chocolate-making
Daniel Hodgson explains the physics of chocolate-making.

Jun 24, 2019 • 6min
Adapting to climate change
Chris Field discusses misconceptions about climate change and how humans can adapt to a warming planet.

Jun 11, 2019 • 6min
Climate change and global economic inequality
Noah Diffenbaugh and Marshall Burke discuss how global warming impacts economies and income inequality.

Jun 11, 2019 • 7min
Bacterial symbiosis with bobtail squid
Margaret McFall-Ngai describes how a symbiont bacterium affects a host cephalopod.

Jun 11, 2019 • 14min
Aftermath of Chicxulub asteroid
A paleontological site preserves the immediate aftermath of the asteroid impact that may have caused a global mass extinction.

Jun 11, 2019 • 6min
Immigration and economic mobility
Thor Berger and Per Engzell explore connections between European immigration and present-day economic mobility in the US.

Jun 11, 2019 • 9min
Parenting and STEM careers
Erin Cech discusses parenting and gender disparities among STEM professionals.