Looking for a small, quiet wind turbine to stick on your roof and generate free energy for you whenever there's a breeze? Take a look at the Energy Ball. A small, beautifully designed turbine, it'll generate more energy than any other personal turbine while remaining whisper quiet.

The spherical Energy Ball takes advantage of the Venturi Effect, something that measures the pressure created when water moves through a contained space. By taking that principle into effect, the Energy Ball is able to bring extra efficiency to the table that allows it to generate energy even with very slow wind speeds. What are you waiting for? We're talking free energy here!

HomeEnergy, via io9