This origami mask is amazing. It's true origami, one sheet of paper folded with no cuts. But the result is mesmerizing: a sculpture of a face, reminiscent of an ancient Greek statue. And Joel Cooper's technique is unusual: it looks as if he folded the paper into a complex two-dimensional pleating, and then folded that into a face.

Even more intriguing: the mask (and another similar one) are for sale on eBay...