YouTube link, if you don't want to download the video:

http://www.youtube.com/watch?v=oCXzcPNsqGA

Now for the bad news: http://www.genetic-programming.com/patents.html

Classic work - the paper is well worth reading. A couple of highlights:

Using a fitness metric of 'distance travelled by CG', one solution was simply to build a very tall tower, and wait for it to fall over.

The evolved solutions would exploit bugs in the physical modelling - exploding the maths by moving two blocks very close together.

You can run the simulations on your computer as a screensaver: http://www.spiderland.org/screensaver