Each of the innovators profiled by Technology Review has answered vexing questions put to us by modern technology. Whether it is shaping the rules for social networks, making a flexible robot hand or reducing a traveler's carbon footprint, each young inventor has advanced his or her field. "Since 1999, the editors of Technology Review have honored the young innovators whose inventions and research we find most exciting; today that collection is the TR35, a list of technologists and scientists, all under the age of 35. Their work—spanning medicine, computing, communications, electronics, nanotechnology, and more—is changing our world."