"Cyborg. The word has a whiff of the implausible about it that leads many people to discount it as mere fantasy. Yet cyborgs, real ones, have been among us for almost 50 years. The world's first cyborg was a white lab rat, part of an experimental program at New York's Rockland State Hospital in the late 1950s. The rat had implanted in its body a tiny osmotic pump that injected precisely controlled doses of chemicals, altering various of its physiological parameters. It was part animal, part machine."