Big Food's having a tough time, and yogurt is no exception. Large, bureaucratic food companies have trouble keeping up with consumers looking for fresh ingredients and new products. Newcomers like Chobani are beating out old standbys such as General Mills' Yoplait and DannoneWave's Dannon. This week on Material World, Jenny and guest host Craig Giammona dig into the evolution of yogurt, the changing consumer and the lessons yogurt provides for the rest the grocery store. Correction: A previous version of this episode misstated Gary Hirshberg's last name.