Humans have only been using electricity for more than a hundred years, and what you don't know is that in nature hundreds of millions of years ago, animals have been able to use electricity to prey or defend themselves. Yes, that is a kind of electric fish living in South America, the scientific name of the electric eel.
The electric eel is nearly 2 meters long and weighs up to 20 kilograms, is slow in motion, and is often active in calm freshwater areas. The physical appearance is a bit strange, similar to the catfish eaten at home. There are power generation organs growing on both sides of the body, and this fish can be described as the first animal "live power station", with a maximum output voltage of up to 300 volts, and some even up to 650 volts. Such a high voltage electrocution is easy enough to see that the electric eel is a very dangerous animal.
This thing is not only a "live power station", but also a "living radar", in its tail there is a device that emits electromagnetic waves, and some small bumps on the head are antennas that receive reflection waves from objects, and the electric eel uses this radar system to identify objects that enter its range of action, if it is a favorite food, the electric eel quickly aims at the target, activates the power generation organ, shoots "lightning", kills it, and then eats the victim.
Electric eels can not be released for a long time, each time the discharge of electricity needs a long recovery period, taking advantage of this feature, the local indigenous people, often first a group of cattle and horses into the river, angering electric eels, many of those cattle and horses are killed by electric eel discharge, the scene is very frightening, forcing electric eels to consume the electricity, and then go down to the river with harpoons to catch big fish. This fish is delicious.
The magic of nature is everywhere and is attracting us to explore!