Shape-shifting robots take form

How would you like to have your very own shape-shifter? Perhaps a liquid metal T-1000 Terminator to help around the house. Or a universal tool kit that could reshape itself into any implement at the press of a button. For an astronaut in orbit, an army mechanic in remote terrain or even a homeowner trying to fix a furnace on a cold winter night, it could be just the thing.

Well, one day maybe. The traditional approach to building shape-shifting devices has been to use materials based on shape memory alloys, polymer sheets or nanoparticles. But these have proved difficult to control and have other limitations, so researchers have begun taking a different and less exotic tack.

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