Symmetry is everywhere in our natural world. Just take a look at your hands, a butterfly, or a sunflower. It’s easy to pass off the idea of symmetry and symmetric structures as a simple quirk of ...
Erno Rubik, who devised one of the world’s most popular and enduring puzzles, opens up about his creation in his new book, “Cubed.” By Alexandra Alter The first person to solve a Rubik’s Cube spent a ...
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