'World's Most Powerful' Tidal Turbine Starts Cranking Out Energy

When you hear the word "turbine," in conversation, chances are good you're picturing the same sort of giant windmill-esque apparatuses jutting out of the ground, turning wind into good, clean, fuel. But there's a new kind of turbine on the block--tidal turbines, that jut out from the ocean and let the water's currents...