We’re learning a lot about new green energy technology these days, from wireless solar power to smog-eating concrete. And now this: a plastic used in tubing can actually produce electricity when stretched. Researchers have known about this property for a while, but weren’t sure how to take advantage of it—until now. Scientists at the University of Texas, in conjunction with others, are working to create fibers from the material, in order to open the door for an nearly infinite range of green energy applications, as well as potential medical breakthroughs, such as artificial muscle.