A robot developed by five young engineers at Mitsubishi Electric Corp. was recognized by Guinness World Records as the fastest to solve a 3x3x3 puzzle cube--almost as quickly as the blink of an eye.

Mitsubishi Electric Corp.’s robot cracked a puzzle cube in an astonishing 0.305 seconds, securing its spot in the Guinness World Records. The Rubik’s Cube, invented in the 1970s by Hungarian ...