This generator harvests power from a car’s rolling tires

Some 10% of the energy generated by a car’s engine is lost due to friction between tires and the pavement. What if you could harness this lost energy somehow? A group at the University of Wisconsin-Madison in collaboration with researchers in China have found a ingenious way to collect and use this friction energy by effectively inserting nanogenerators into tires.

Stunning light circles over military helicopters in Afghanistan [PICS]

Your first impression after seeing one or more of the photos featured in this piece might be that these are ‘shopped, painted or feature an astronomical event of some kind. Your assumptions couldn’t be farther from the truth, and believe it or not these beautiful dancing lights over the helicopters’ rotor blades were captured in real time by photographers. This