When you think of origami, you think of paper swans, but these sculptures made by father and son duo Martin and Erik Demaine will make you rethink the entire idea. This is a self folding, pre-creased origami,

Using the principle of curved origami sculpture, paper will fold itself into all kinds of crazy shapes based on how it's created. The Demaine's have spent a lot of time studying how this works, and using the principles of this phenomenon, they created these works of art.

The phenomenon isn't well understood, and Erik Demaine has a PhD in Computational Origami. [Eric Demaine via 10 Times One via Laughing Squid]