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March 2, 2015

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A mold of 4-year-old Hailey Dawson's left hand sits next to the prototype Robohand as Katherine Lau works on the design July 23, 2014 at the University of Nevada, Las Vegas.

Aaron Mayes / UNLV Photo Services

A mold of 4-year-old Hailey Dawson's left hand sits next to the prototype Robohand as Katherine Lau works on the design July 23, 2014 at the University of Nevada, Las Vegas.