PNAS Science Sessions

Jonathon Yuly, David Beratan, and Peng Zhang investigate how electron bifurcation reactions work.

Adam Mastroianni and Daniel Gilbert explore why conversations almost never end when people want them to.

Joe Levy shows how glaciers on Mars can reveal its climate history.

Marianne Alleyne, Aimy Wissa, and Ophelia Bolmin explain how the click beetle amplifies power to pull off its signature jump.

Mara Reed and Michael Manga explore why Yellowstone's Steamboat Geyser resumed erupting in 2018.

Martin Bizzarro tells what zircon crystals reveal about the geological history of Mars.

Aleix Martinez explains why facial expressions often are not accurate indicators of emotion.

Amanda Rodewald, Ivan Rudik, and Catherine Kling talk about the hazards of ozone pollution to birds.

Se-Jin Lee and Emily Germain-Lee explain a way to preserve bone and muscle mass during spaceflight.

David Crowder and Gengping Zhu explain how to predict the spread of the Asian giant hornet.