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The nanobot war is escalating. Not content to let Penn State's nanospiders win the day, Georgia Tech has answered back with a noticeably less creepy blood-swimming robot model of its own, whose look is more that of a fish than any arachnid this time ...

An "ingestible sensor" doesn't sound like the tastiest of snacks, but soon it might be just what the doctor ordered. A tiny microchip which activates upon contact with stomach acid has recently been given the green light by health regulatory agencies...