Artificial electric currents guide walkers round obstacles.

It sounds like the stuff of magic — or a Harry Potter Imperius curse. But scientists have announced that they can guide your movements by remote control. They’ve steered blindfolded humans around the paths of a botanical garden in Sydney, Australia, using electric currents applied just behind the walkers’ ears to affect their balance and navigation. The same technique, they say, might be used in virtual-reality simulations, or to cure motion sickness.

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