Scientific American: Nanotech for New Organs

This is pretty amazing. Applying fractal computational models to the creation of an artificial vascular network to support the growth of artificial human organs.

Kaazempur-Mofrad and his colleagues used fractal computational models to design networks mimicking the intricate branching pattern of actual blood vessels. They then etched those nano networks onto silicon surfaces, which in turn served as molds for biocompatible polymer films. The next step was to sandwich a microporous membrane between two films and seal them together.