Even without a brain, metal-eating robots can search for food

This 'metal-eating' robot can follow a metal path without using a computer or needing a battery. By wiring the power-supplying units to the wheels on the opposite side, the robot autonomously navigates towards aluminum surfaces and away from hazards that block its energy source.

from Latest Science News -- ScienceDaily https://ift.tt/3wgXFVP

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