Amazon expands pay-by-palm service in US grocery stores

Customers shopping at Amazon's US-based Whole Foods grocery stores will be able to pay for items by hovering their palm over a scanner, much like shoppers already do with smartphones or credit cards.

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This 'electronic tattoo' can tell when you're stressed out

Researchers at the University of Texas at Austin have developed a temporary "e-tattoo" for the palm that can track excitement and stress using the skin's electrical conductivity. The e-tattoo could be a reliable way for people ...

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