Though he'd never seen one in person, Rob Evershed, a member of the group, recognized the hollow, rounded object as a Roman dodecahedron. Everyone started Googling on their phones. Work stopped as ...

There are five platonic solids, the tetrahedron, cube, octahedron, dodecahedron and icosahedron ... and one curved face made from a sector of a circle. A sphere is completely curved, a ball ...