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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.

Jun 22, 2020

Francesco Paesani, Thomas Zeuch, and Valeria Molinero discuss the size limits of ice crystals.

Jun 8, 2020

Julia Schwab and Steve Brusatte describe how marine reptiles made the evolutionary move from land to sea.