Solar and wind power are amazing sources of energy, but the issue is that there isn’t always a shining sun or gusty breeze. There are, however, always waves on the coast. And with the help of a new device made by an Australian company, harnessing the endless motion of the ocean becomes very competitive. The new device is essentially an artificial blowhole that allows water to flow through it, powering a turbine within the device that generates electricity. The company claims that the system is so efficient that it can produce electricity at roughly the same cost as coal.