In January 2009, when architecture writer Andrew Blum arranged to have his home internet service repaired, the technician who arrived at his Brooklyn apartment told him that the source of the problem was relatively low-tech: a squirrel had been chewing the rubber-coated wire that ran from Blum's building. Not much could be done, the technician said, other than wait for things to get better on their own, and they did. But Blum was shocked by his realization that the emails and websites he'd been reading on the computer had first passed through a wire in his back yard; his wonky home service was a physical problem, not a strictly technological [...]