what's the deal with it? electrical signals power our brains so to speak, and also seem to power almost every tangible thing we currently have. electrical fields are given off by living things and some animals hunt by pinpointing those electrical fields. there's a whole lot of importance for something so simple that is incredibly difficult to understand. the same electricity that can kill you can restart your heart in an emergency room.
It's the electromagnetic spectrum, an interesting thing. http://www.walter-fendt.de/ph11e/emwave.htm Light traveling as perpendicular magnetic and electric field waves. Using electromagnetic fields is really the only way to hunt, else you'd be crawling around in the dark.