Heat to electricity - US Department of Energy researchers want to convert body heat into gadget-juice
We waste energy all the time. Incandescent light bulbs emit most of their energy as heat, and just a wee bit a visible light. Energy that goes into cooling our refrigerator is wasted as heat. Electrical energy in our computers generate a lot of heat (its the reason that laptop is keeping your giblets nice and toasty). Even our bodies are wasting...
