Current

Long high voltage direct current (HVDC) kV in Canada. Source: Tonyglen14.

Return of electrical technology previously pioneered by Thomas Edison

Above: An electric current, behaving like a liquid, creates eddies (the white arrows) whose particles produce heat (in red and orange). Below: when the current operates according to Ohm's law, the heat is generated only around the two electrodes between which the current flows (in red and orange)

Electricity flows in your hands