Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/what-if-cracks-in-concrete-could-fix-themselves-congrui-jin Concrete is the most widely used construction material in the world. It can be found in swathes of city pavements, bridges that span vast rivers and the tallest skyscrapers on earth. But it does have a weakness: it’s prone to catastrophic cracking that has immense financial and environmental impact. What if we could avoid that problem? Congrui Jin explores how to create a more resilient concrete. Lesson by Congrui Jin, directed by Aeon Production. Thank you so much to our patrons for your support! Without you this video would not be possible! Emma Moyse, Fahad Nasser Chowdhury, Marin Kovachev, Roman Pinchuk, Daniel Huerga, Maria Lerchbaumer, Edgar Campos Barrachina, Dianne Palomar, The Brock, Curtis Light, Ernest Chow, Liana Switzer, Maija Chapman, Pamela Harrison, Mighterbump , Beatriz Inácio, Robert Hargis, Mircea Sîrbu, Irindany Sandoval, William Bravante, Elizabeth Parker, Sai Krishna Koyoda, Samuel Barbas, Maxwell Ingram, Victoria Soler-Roig, Abdulmateen Aderinto, Pavel Maksimov, Barbara Younker, Cyrus Garay, Yvette Mocete, Mike Azarkman, Patricia Alves Panagides, William Biersdorf, Michael Aquilina, Vinamr , FireWolfLasers, Kshitij Shah, Mohammad Said, Teach Me Diné - Navajo Language, Victoria Veretilo, Rebecca Reineke, Kyanta Yap, Brandon Thomas, Lewis Westbury, Ojas Kapoor, Mirzat Turap, Jaime Arriola, Emilia Alvarado, Javid Gozalov and Philipp Hiestand.