Episode 5: A battle over science and ethics unfolds. World Athletics releases and then tweaks multiple policies impacting DSD athletes, while critics cry foul. In this episode, World Athletics doubles down on its claims, Caster Semenya challenges the rules again, and we dig deep on a big question: what constitutes an "unfair" advantage on the track? To listen to this series sponsor-free and support NPR, sign up for Embedded+ in Apple Podcasts or at plus.npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy