What if our infrastructure could repair itself? with Mark Miodownik and Congrui Jin

This episode of TED Tech explores a transformative vision for infrastructure: a future where roads, bridges, and buildings can repair themselves, inspired by nature's own self-healing systems. Host Sherelle Dorsey introduces two talks centered on 'animate materials'—engineered substances that sense damage, heal autonomously, and even disassemble safely. The first, by material scientist Mark Miodownik, reveals how microscopic cracks in roads and concrete can be prevented from becoming potholes through embedded nanoparticles and self-repairing bacteria. He presents real-world examples, including bioconcrete that uses dormant microbes to regenerate calcium carbonate and seal cracks, and biodegradable plastics that dissolve when trees mature. The second segment dives deeper into bioconcrete, highlighting its global adoption—from Quito’s resilient highways to Malta’s historic water tower restoration—and policy shifts like New York’s Buy Clean Concrete mandate and China’s Belt and Road integration. Together, these innovations point toward a sustainable future where infrastructure evolves rather than degrades, reducing waste, emissions, and costs. The episode challenges listeners to rethink not just materials, but our entire economic model of consumption and disposal.