Geometric shapes that have evolved to walk

Karl Sims - evolved virtual creatures (1994) http://www.youtube.com/watch?v=oCXzcPNsqGA

End-over-end Worm - Evolved Virtual Creature http://www.youtube.com/watch?v=l-qOBi2tAnI&fmt=18

We studied these in one of my under-grad AI classes a few years back.

Emergent behavior is always fun in practice.