Bees solve Traveling Salesman Problem

And again:

http://news.ycombinator.com/item?id=1834170

http://news.ycombinator.com/item?id=1833774

http://news.ycombinator.com/item?id=1831271

http://news.ycombinator.com/item?id=1830232

http://news.ycombinator.com/item?id=1829211 <- This one has comments