Interesting article from MacArthur fellow Erik Demaine covering the history of origami-style models that include curved folds. Shown above is “Concentric Circular Tower” by late UCSC Professor and noted computer scientist David A. Huffman (Wikipedia), whose curved-origami work was covered posthumously by the New York Times in 2004. The Flickr curved fold pool is chock-a-block with fascinating models of this type. [Thanks, Jon!]

More: Curved tetrahedron origami