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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.

Jan 30, 2023

Researchers document animal extinctions in the Ediacaran Period that may have preceded the earliest known mass extinction.

Jan 16, 2023

Bo Wang and Chunpeng Xu describe how fossilized katydids provide insight into the role of insect sounds in the Mesozoic.

Jan 3, 2023

Tom McGrath describes how the neural network AlphaZero taught itself how to play chess without observing a human game.