The cover story for Audible Scientific American July 2003 looks at how adaptive antenna arrays can vastly improve wireless communications by connecting mobile users with "virtual wires." Also in this issue: new evidence about how cells turn malignant and how cancer spreads, the cost of over-fishing the world's oceans, filling in clues about the lost Indus Valley civilization, and why heart-lung machines can sometimes leave patients wondering why their memory is failing.
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