An international research collaboration has overturned the long-standing belief that the atomic nucleus of lead-208 is perfectly spherical. The discovery challenges fundamental assumptions about ...

Generate Platonic solids, Archimedian solids, Catalan polyhedra, the trapezohedron, and some stellated polyhedra. You can also stellate any of the polyhedra, select polyhedra by their characterics and ...

You can create regular polygons with optional rounded corners and alignment features not available with circle(). The file also provides teardrop2d, which is useful for 3D printable holes. Many of the ...