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Named for Plato, who theorized that the classical elements were made of these regular polyhedrons, three of the Platonic solids are composed of equilateral triangles: the tetrahedron, octahedron, and ...

I’ve always loved stargazing. As I write this in late June 2015, it’s rainy season here in Japan—but if the clouds ever part during the evening hours, you’re sure to catch twinkling Venus and nearby ...