Erno Rubik holds a Rubik's cube as he poses during the world's largest Rubik's Cube championship in Aubervilliers...
Erno Rubik, the creator of the puzzle, holds a Rubik's cube as he poses during the world's largest Rubik's Cube championship in Aubervilliers, near Paris, France, July 15, 2017. REUTERS/Stephane Mahe