The whole article acts like we have never discovered thermocouples: http://en.wikipedia.org/wiki/Thermocouple http://en.wikipedia.org/wiki/Thermocouple I mean

The whole article acts like we have never discovered thermocouples: http://en.wikipedia.org/wiki/Thermocouple http://en.wikipedia.org/wiki/Thermocouple I mean the voyager spacecraft are powered by them: http://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator http://en.wikipedia.org/wiki/Radioisotope_thermoelectric_gen... Along with many gas appliances with pilot lights.