High-powered lasers can be used to steer lightning strikes

Lightning rods have been used to safely guide strikes into the ground since Benjamin Franklin's day, but their short range (roughly the same radius as the height) and fixed-in-place design makes them ineffective for protecting large areas. The technology may finally be here to replace them in some situations. European researchers have successfully tested a system that uses terawatt-level laser pulses to steer lighting toward a 26-foot rod. It's not limited by its physical height, and can cover m...