High-voltage power lines in the United States will soon be monitored by “magic balls” from Norway. Heimdall Power is rolling out unique technology in the form of sphere-shaped sensors that have increased power-line capacity by 30% in Europe, according to a story on the tech from Electrek. Better yet, early users of the sensors are reporting that they are saving money because transmission lines are better utilized in their networks. “This summer … We were able to disconnect one of two parallel li...