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New algorithms and electronic components could enable printable robots that self-assemble when heated.

Read: New Printable Robots Could Self-Assemble when Heated

The actuator — which would enable a robot to move — is a foldable coil, which would need to be augmented with a pair of iron cylinders that could be magnetized by an electrical current. Aluminum isn't a good enough conductor to yield an actuator that exerts much force, but a copper-coated polyester should do the trick.

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