Mahangu [pearl millet] thresher, prototype. Wieler (American, b. 1982) and Donna Cohn (American, b. 1959), Hampshire College, with the MIT International Design Development Summit; team: Francisco Rodríguez; George Yaw Obeng, Technology Consultancy Centre of KNUST; Brian Rasnow, Department of Applied Physics, California State University; Thalia Konaris; Michelle Marincel in …