The team of researchers from University of Minnesota has found a way to harness energy from our hot castoffs. The group has apparently created a brand spanking new alloy that spontaneously creates energy when its temperature raised by a small amount. Future uses a material Ni45Co5Mn40Sn10 include charging a hybrid car battery with the help of waste heat from its exhaust. The material is a phase changer; it can go from non-magnetic to magnetic in moments, when the temperature rises. They also try to get the waste heat from computers. Dont forget to check out the video