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The three-dimensional puzzle, which became a huge success in the early 1980s, is among toys being given to the intelligent sea creatures to determine whether they favour a particular tentacle, or if they are octidextrous. Experts believe octopuses use a preferred arm for feeding and touching objects and will test the theory with a month-long observation project in Sea Life Centre attractions across Europe.


 octopus Rubik's Cube preference
A 30-year quest to find the fewest number of moves needed to solve any one of the billions of configurations for a Rubik's Cube may have ended. ... "We now know for certain that the magic number is 20."


 Rubik's Cube mathematics cube algorithm puzzle