Building on the cellulose structure that gives an apple its shape, he "grows" lifelike human ears, pioneering a process that might someday be used to repair body parts safely and cheaply.
Ashton Cofer-A young inventor's plan to recycle Styrofoam
David Lang-My underwater robot
Hod Lipson-Building "self-aware" robots
Alan Eustace I leapt from the stratosphere. Here's how I did it