His electrical currents, by contrast, would be detectable by magnetometers at the surface as well as by satellites watching the ionosphere if they do indeed exist in the ground as well as the lab.
While Sony's new Bloggie Touch provides the template for how simple and easy a touchscreen camcorder could really be, Kodak's similarly well built and attractive PlayTouch provides a stark contrast, with a modicum of simplicity on the surface, but a megaton of functionality to uncover.