Why Do Power Lines Carry Thousands of Volts Instead of Just 120V

Why do power lines carry hundreds of thousands of volts instead of the gentle 120 volts your home uses? The answer is a war, an equation, and a miracle device. When Edison's direct current proved it could barely travel a mile, Westinghouse and Tesla bet everything on alternating current and the transformer, a device that trades voltage for current and slashes wasted heat by the square of the change. Follow the journey from Pearl Street's tiny DC kingdom to Niagara Falls, meet the linemen who raised the steel giants, and learn why those humming towers are the reason electricity ever became cheap enough to be ordinary. #PowerGrid #ElectricalHistory #TeslaVsEdison #EngineeringExplained #HighVoltage