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With the rapid emergence of digital devices, an unstoppable, invisible force is changing human lives in ways from the microscopic to the gargantuan: Big Data, a word th at was barel y used a few years ag o but now gove rns the day for many of us from the mome nt we awaken to the extingu ishing of the final l ate-eve ning ligh t bulb. This m assive ga thering and analyzing of d ata in rea l time is al lowing us to not onl y addres s some of hu manity bi ggest challeng es but is als o helping cr eate a new kind of planet ary nervous system. Yet as Edward Snowd en and the rel ease of the Prism document s have shown, the accessib ility of al l these dat a comes at a stee p price. The Hu man Fac e of Big Data captu res the promi se and peril of this extraordi nary knowl edge re volution. Wit h the rapid emergence of d igital devices, an un stoppabl e, inv isible force i s chang ing human li v
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