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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. Please scroll down for recent podcasts.

Aug 19, 2019

A collection of research articles explores developments in interfacial transport and mixing, with wide-ranging practical applications.


Aug 5, 2019

Jennifer Mandel outlines the evolutionary history of the sunflower family.


Jul 22, 2019

Jonathan Lefcheck and Robert Orth discuss nutrient pollution and recovery in the Chesapeake Bay.


Jul 8, 2019

Daniel Hodgson explains the physics of chocolate-making.


Jun 24, 2019

Chris Field discusses misconceptions about climate change and how humans can adapt to a warming planet.