
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

Apr 19, 2021 • 12min
Exploring electron bifurcation
Jonathon Yuly, David Beratan, and Peng Zhang investigate how electron bifurcation reactions work.

Apr 5, 2021 • 10min
Exploring the length of human conversations
Adam Mastroianni and Daniel Gilbert explore why conversations almost never end when people want them to.

Mar 22, 2021 • 12min
Climate history of Mars
Joe Levy shows how glaciers on Mars can reveal its climate history.

Mar 8, 2021 • 13min
How click beetles jump
Marianne Alleyne, Aimy Wissa, and Ophelia Bolmin explain how the click beetle amplifies power to pull off its signature jump.

Feb 22, 2021 • 17min
Eruption of Steamboat Geyser
Mara Reed and Michael Manga explore why Yellowstone's Steamboat Geyser resumed erupting in 2018.

Feb 8, 2021 • 13min
Geological history of Mars
Martin Bizzarro tells what zircon crystals reveal about the geological history of Mars.

Jan 25, 2021 • 15min
Learning the language of facial expressions
Aleix Martinez explains why facial expressions often are not accurate indicators of emotion.

Jan 4, 2021 • 17min
Hazards of ozone polution to birds
Amanda Rodewald, Ivan Rudik, and Catherine Kling talk about the hazards of ozone pollution to birds.

Dec 14, 2020 • 18min
Preserving muscle and bone mass in space
Se-Jin Lee and Emily Germain-Lee explain a way to preserve bone and muscle mass during spaceflight.

Nov 23, 2020 • 12min
Predicting the Asian giant hornet’s spread
David Crowder and Gengping Zhu explain how to predict the spread of the Asian giant hornet.