| A brief history of plastic By John Wesley Hyatt, directed by Sharon Colman For centuries, billiard balls were made of ivory from elephant tusks. But when excessive hunting caused elephant populations to decline, they began to look for alternatives. John Wesley Hyatt took up the challenge. In five years, he invented a new material called celluloid, which would become known as the first plastic. Trace the history of the material that ushered in the “plastics century.” View the animation » | | | Are all of your memories real? By Daniel L. Schacter, directed by Ana Luísa Farinha In a 1990’s study, participants recalled getting lost in a shopping mall as children. Some shared these memories in vivid detail, but there was one problem: none of these people had actually gotten lost in a mall. They produced these false memories after psychologists told them they’d gotten lost and parents confirmed it. So what’s going on? Daniel Schacter explores the fallibility of our memory. View the animation » | | | Global plastic waste is a problem that affects us all, and all of us can be part of the solution. TED-Ed, with the support of the Alliance to End Plastic Waste, launched #AllTogetherCleanup to unite students around the world to understand and help solve the global plastic waste problem. Learn more and take action on ed.ted.com/cleanup. Join the challenge » | | |