Mathematicians and hobbyists have had a half-century of fun exploring the some 43 billion billion permutations of Erno Rubik’s creation. Mathematicians and hobbyists have had a half-century of fun exploring the some 43 billion billion permutations of Erno Rubik’s creation. Mathematics, Rubik’s Cube, Inventions and Patents, Toys, Spin Master, World Cube Assn, Rubik, Erno, Invader (1969- ), Hofstadter, Douglas R, Demaine, Erik, California, Hungary, your-feed-science NYT > Science
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