Rubik Born: Creator of the World's Best-Selling Puzzle
Erno Rubik invented his namesake cube in 1974 as a teaching tool for spatial relationships, then spent weeks solving his own creation before realizing its commercial potential. The puzzle sold over 450 million units worldwide, becoming the best-selling toy in history and spawning a competitive speedcubing subculture. His work as an architect and educator ensured that the cube's underlying mathematics remained central to its appeal.
July 13, 1944
82 years ago
What Else Happened on July 13
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