A Spanish startup called Voltrac says it is building a new breed of smart tractor—one that could sow fields by day and run weapons to soldiers by night. And while the Hot Wheels-looking, fully electric tractor is currently remote-controlled, Voltrac is working to make its next version fully autonomous. In theory, they say, one remote operator, be it a farmer or a military commander, could oversee multiple shiny steel tractors working simultaneously. Voltrac says its low-profile tractor uses distributed electric propulsion via per-wheel motors, which it claims helps eliminate around 70 percent of traditional tractor components. For military applications, the tractor could be used to remotely inspect areas for signs of mines, improvised explosive devices, or other unexploded ordnance.