Quintessentially American invention of the day: a car that warns you when you've gained weight. The car weighs the driver regularly, keeps track of their weight and warns them when they need to lose weight, so they can stop driving and walk the pounds off drive to the gym and get some exercise. (via Techdirt)

(I'm sure there are potential Homeland Security applications too; imagine a car that remembers what its driver weighs, and refuses to move if the driver is obviously a different person. That'd certainly cut down on hijackings by suicide bombers.)

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