<p>NAS member David Baker describes how to design proteins from scratch and the products of his lab's own protein design efforts</p>

Nutrient dilution and grasshopper decline

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.