Polyhedrons come in all shapes and sizes. Anything that has multiple faces joined at their edges can be a polyhedron. Picture Earth as a six-sided cube. Or as a triangular pyramid with four faces ...

In nature, many things have evolved that differ in size, color and, above all, in shape. While the color or size of an object can be easily described, the description of a shape is more complicated.

A strange triangular formation in the Nevada desert is fueling speculation that it may be the work of a long-lost ancient civilization. Spotted on Google Earth, the structure is located in Battle ...