A Swedish company may finally have found a way to harvest energy from the endless motion of the ocean. The company, CorPower Ocean, has created a buoy that converts the bobbing motion of waves into electricity with maximum efficiency. Whereas other wave energy devices can stretch hundreds of feet across and weigh well over a thousand tons, CorPower’s bobbing red machine is a mere 26 feet in diameter and can generate about 250 kilowatts of power—enough to cover the electricity needs of 200 homes. Wave-power farms could contain hundreds or even thousands of them, providing a steady stream of renewable energy to help power the future.