Slime Molds- single cell organism solves shortest path algorithm

Scientists arrange food sources around a slime-mold as major cities in Japan. The slime-mold grows and creates a nutrient transportation network that's almost identical to the rail-system in Japan. Mind blowing.

http://www.youtube.com/watch?v=sNAxrpzc6ws&feature=player_detailpage#t=3830s