A scrambled Rubik’s cube can be solved in just 25 moves, regardless of the starting configuration. Tomas Rokicki, a Stanford-trained mathematician, has proven the new limit (down from 26 which was proved last year) using a neat piece of computer science. Rather than study individual moves, he’s used the symmetry of the cube to study [...]
COLOMBO, Sri Lanka – Arthur C. Clarke, a visionary science fiction writer who won worldwide acclaim with more than 100 books on space, science and the future, died Wednesday in his adopted home of Sri Lanka, an aide said. He was 90.
In an interview with The Associated Press, Clarke said he did not regret never [...]
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