No batteries? No problem. These scavenger robots ‘eat’ metal to harvest energy
Robots have made some pretty major advances in the past few years. However, one thing standing in the way of a science-fiction world in which robots crowd the environment like one of thosefuture war scenes from the Terminator moviesis how exactly such robots should be powered. Batteries, which store energy internally, are all well and good but have the issue of being heavy and offering a limited supply. That’s a major hurdle for present robots in real-world environments....