The concept photo says it all. We’ve seen the power of kinetic energy — rub your hands together and you get a few joules of soothing warmth. Now if only you could store that energy to do something more pragmatic. In the future, why not have batteries that charge using your index finger. The same swagger we see when tossing our key ring to that really nice car can be put to better use charging your mobile phone. You can even go further as to having a hamster wheel charge your batteries, but this would of course raise humane issues. What intrigues me is the simplicity of how this all Read more »