In the universe of TV’s Doctor Who, the scariest adversaries of all are the hybrid robot-organic life-forms known as the Daleks.
Each Dalek is a living being encased in a robotic shell equipped with lethal weaponry, frequently employed to terrify London, other cities or entire planets. But if you think that’s scary, now imagine nanoDaleks, too small to see, scurrying around inside your body, each of them chanting “Exterminate!”
It’s not entirely far-fetched. Earth-based scientists in the here and now are developing something strikingly similar. But the idea is not to invade and conquer — rather to cure or heal.
