Robotic Mold

Canis Lupus writes to mention that researchers from the University of West England are designing the world's first biological robot, constructed from mold. The robot, "Plasmobot," will be created using vegetative slime mold called plasmodium (Physarum polycephalum) that is commonly found in forests, gardens, and most damp places in the UK. "This new plasmodium robot, called plasmobot, will sense objects, span them in the shortest and best way possible, and transport tiny objects along pre-programmed directions. The robots will have parallel inputs and outputs, a network of sensors and the number crunching power of super computers. The plasmobot will be controlled by spatial gradients of light, electro-magnetic fields and the characteristics of the substrate on which it is placed. It will be a fully controllable and programmable amorphous intelligent robot with an embedded massively parallel computer."

Comments

Not Really a Robot

[Garrett Fox]

The article explains what's meant by saying that the "robot" will compute: "Most people's idea of a computer is a piece of hardware with software designed to carry out specific tasks. This mould, or plasmodium, is a naturally occurring substance with its own embedded intelligence. It propagates and searches for sources of nutrients and when it finds such sources it branches out in a series of veins of protoplasm. The plasmodium is capable of solving complex computational tasks, such as the shortest path between points and other logical calculations. Through previous experiments we have already demonstrated the ability of this mould to transport objects. By feeding it oat flakes, it grows tubes which oscillate and make it move in a certain direction carrying objects with it. We can also use light or chemical stimuli to make it grow in a certain direction."

That's like saying that the bamboo plant on my desk is a robot. It, too, transports substances in a direction determined by light input, and computes the optimal direction for approaching a light source. I could even claim that I'm adding "logic gates" to it by covering or pruning certain leaves.

Says the article, the mold robot has "the number crunching power of super computers" because it carries out computing tasks. That claim is also pretty silly. The A* algorithm can find the shortest distance between paths, and it doesn't require anything that could be called a supercomputer today.

So, this thing is a "robot" in the sense that pointing at random objects and calling yourself a master of "found art" is art.

Re:Not Really a Robot

[sonnejw0]

Exactly. In fact, plasmodium does not compute optimal distances, it has no senses to detect objects at a distance. It detects chemical concentration gradients and moves to or from higher concentrations of chemicals it likes or dislikes. It does not compute. In fact, if you've ever seen one move, it wriggles around a lot. It has to, in order to detect its immediate environment.

What is the point of this article?

Re:Cold Sweats

[Zocalo]

I think it can be summed up best as "what could possibly grow wrong?"

Interesting Background Material

[DynaSoar]

From an unlikely source: PubMed http://www.ncbi.nlm.nih.gov/sites/entrez

Search terms "plasmodium Physarum polycephalum"

I went looking for negative stuff, knowing plasmodiums were behind malaria. Couldn't find any for this stuff, but I did find some juicy bits from biomedical science regarding its computational ability, or rather its internal processes that can be used as such. Not many will be able to get the referenced material, but just the abstracts are tasty.

Re:Interesting Background Material

[Archaemic]

The plasmodium behind malaria is not the same kind of plasmodium. IIRC, malaria is caused by a sporozoan, which is completely different from a slime mould. In fact, plasmodium is not even a kind of slime mould. In reference to slime moulds, plasmodium is just the macroscopic form of any slime mould.

Re:Interesting Background Material

[reverseengineer]

Yeah, the reason slime molds are referred to as plasmodium is because the slime mold colony lacks defined cell walls or membranes between what would normally be considered individual cells. The mold can essentially be thought of as a single cell with many nuclei, since cytoplasm is continous throughout the entire colony. As the parent notes, this type of structure (a lifecycle stage, really) has nothing to do with the protozoa which cause malaria, which just happen to be of genus Plasmodium.

ObNethack

[HonestButCurious]

.........
..@F.....
.........
You hit the brown mold.  You are suddenly very cold!

Re:Good marketing team

[PotatoFarmer]

I don't know about you, but we've tried our own implementation of this phenomenon in our office fridge, and haven't gotten any good computational output. Sure, the General Tso's Chicken came up with a fairly solid quicksort implementation, but that Greenish Liquid That May or May Not Have Been a Salad At One Time still hasn't figured out basic pointer arithmetic, much less decent memory management.