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The History and Memory of Complex Systems
The body as a whole has a modular distribution of tasks if you like. You can look at the nesting of blood vessels, which is part of what Jeffrey West is talking about. And would we say that I mean the example of the bloodstream they're all self similar? But you can also have nested structures that are not self similar and not correct when you move to a new level in the hierarchy - it looks quite different there. We could go back to the planetary structures in space that they're not self similar in the strict sense. Often we find clusters so that's groups of nodes in a network that are sort of more closely connected to one another than other groups. And then you can have