Photo: Qiao Chang
Qiao Chang of SmugMug is a commercial photographer who creates origami figures as a hobby. One of her works takes the form of a mathematical puzzle called a Soma cube:
A solid dissection puzzle invented by Piet Hein during a lecture on Quantum Mechanics by Werner Heisenberg. There are seven soma pieces composed of all the irregular face-joined cubes (polycubes) with *=4 cubes. The object is to assemble the pieces into a cube. There are 240 essentially distinct ways of doing so (Beeler 1972, Berlekamp et al. 1982), as first enumerated one rainy afternoon in 1961 by J. H. Conway and Mike Guy.
http://qiaochang.smugmug.com/Other/My-Origami-Collection/8551061_krjgW#563203570_dFKUD-O-LB via GearFuse | Soma Cube Explanation