
Hungarian professor Ernő Rubik invented his puzzling cube in 1974, 40 years ago. 350 million of them have been sold, and each can be scrambled 43 quintillion ways. The adept can solve the puzzle in 20 moves.
More:
“Rubik’s Cube Turns 40: A Conversation With Its Inventor,”Paolo Mastrolilli, Worldcrunch
“Twist and shout: Rubik’s Cube continues to puzzle 40 years later,” Justin Scuiletti, PBS News Hour
“A Cube With a Twist: At 40, It Puzzles Anew,” James Barron, New York Times
“Rubik’s Cube Proves It’s Hip to Be Square,” Jackie Bischoff, Wall Street Journal
“Quintillions of permutations: The Rubik’s Cube at 40,” Christian Donlan, Eurogamer
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Shortlink: http://wp.me/p6sb6-jfL
Top image (“Portrait of Johannes Neudörfer, His Son, and Their Rubik’s Cube, after Nicolas Neufchâtel”) by Mike Licht. Download a copy here. Creative Commons license; credit Mike Licht, NotionsCapital.com
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