People tend to be pretty divided on RFID implants, either hailing them as an extremely convenient innovation or decrying them as ‘the mark of the beast’. But RFID microchip implants do have a lot of practical uses: they could eliminate the need for keys, allowing you to unlock the doors of your home or your car with a wave of your hand. They may also be used to track surgical sponges during operations to ensure that they aren’t left behind inside patients. The FDA has approved the implantable microchips, which are about the size of a grain of rice, for use in humans in 2004.
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