It’s likely the world in the not-so-distant future will be increasingly populated by computerized people like Amal Graafstra. The 37-year-old doesn’t need a key or password to get into his car, home or computer. He has programmed them to unlock at the mere wave of his hands, which are implanted with radio-frequency identification tags. The rice-size gadgets work so well, the Seattle resident said, that he has sold similar ones to more than 500 customers through his company Dangerous Things.
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