Or, to help detect identify theft, check every few months by looking up your Experian report on, say, Presidents Day, TransUnion on July 4 and Equifax on Veterans Day.

WSJ: Getting Going: How to Fix a Credit-Report Error

Such systems are able to automatically detect and identify human faces using recognition algorithms.

BBC: Big Brother is watching you shop

One possible defense application: Identify the receptors that dogs use to detect explosives, clone them and create a bomb-sniffing machine.

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