At an age when many graduates are just beginning their careers, 22-year-old Connor Gibson is already changing lives with technology. The Tennessee engineer has taught himself dentistry and 3D printing to provide free dentures to Americans who cannot afford them. Working with the nonprofit Remote Area Medical (RAM), Gibson uses mobile 3D printers to produce custom dentures in just hours, reducing a process that once took months. His work has restored smiles to thousands of patients, many of whom break down in tears when they see themselves again. Gibson calls these emotional reactions "mirror moments" and says they remind him why he does the work.
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