Dawn of the zombies 27 May 2006 From New Scientist Print Edition. Subscribe and get 4 free issues. Robin Orwant IT STARTS out like any silicon chip: intricate patterns are drawn with light and etched with acid. But this is no microprocessor destined for a computer. Instead there are minuscule chambers filled with human cells: liver cells, lung cells, fat cells, all connected by tiny channels. A nutrient fluid is pumped through the channels, flowing from one chamber to another just as blood flows from organ to organ in the body. That's the whole point. The chip, created by Michael...