Physarum Has Simple Memory

[Steven Paul Wetzel]

I found this article about how slime molds have developed an external chemical memory to help them avoid areas they have already explored.  When they come across an old slime trail they detect a chemical in it that tells them "look elsewhere, no food here".  The slime mold will follow this programing unless starving.  

Link to article: http://news.mongabay.com/2012/1008-hance-slime-mold-memory.html

This reminds me of a robot programming game called Robozzel. 

Robozzel video tutorial found here: http://www.youtube.com/watch?v=MmqBVWi_Pc0