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The Rubik's Cube is a mechanical puzzle invented in 1974 by the Hungarian sculptor and professor of architecture Ernő Rubik. Common misspellings include rubix cube and rubics cube. This plastic cube comes in four widely available versions: the 2×2×2 ("Pocket Cube"), the 3×3×3 standard cube, the 4×4×4 ("Rubik's Revenge"), and the 5×5×5 ("Professor's Cube"). 6×6×6 and 7×7×7 cubes are also currently being produced.
The 3×3×3 version, which is the version usually meant by the term "Rubik's Cube," has nine square faces on each side, for a total area of fifty-four faces, and occupies the volume of twenty-six unit cubes (not counting the invisible cube in the centre). Typically, the faces of the Cube are covered by stickers in six solid colours, one for each side of the Cube. When the puzzle is solved, each side of the Cube is a solid colour. The original 3×3×3 version celebrated its twenty-fifth anniversary in 2005, when a special edition Cube in a presentation box was released, featuring a sticker in the centre of the white face (which was replaced with a reflective surface) with a "Rubik's Cube 1980-2005" logo, and the 1976 solution book is not to be found. To this date, the fastest recorded solving of a rubik's cube in 12.66 seconds by Aaron Sweeney (Republic of Ireland). This was recorded by RTE on a special live broadcast on July 4, 2006
Originally called the Magic Cube by its inventor, it was renamed Rubik's Cube in 1980 and released worldwide in May of that year, winning a Spiel des Jahres special award for Best Puzzle. It is said to be the world's best-selling toy, with some 250,000,000 Rubik's Cubes and imitations sold worldwide.