Inhabitants of the southern territories of the Mongolian Gobi Desert are afraid of a mysterious worm-like creature, which is called the Mongolian worm of death. Unknown to science, this elusive creature is more than 1.5 meters in length and, apparently, capable of killing either with a jet of the strongest caustic poison, or using a powerful electric discharge.
Nomads talk about a herd of camels walking along the sand, in which a death worm was hiding, and as soon as another camel touched it with its foot, it fell dead. In the 1990s, the famous Czech explorer Ivan McKerl made two expeditions to the Gobi Desert in order to discover this fearsome creature. Although his expedition did not find the death worm itself, she collected a lot of data about this animal by interviewing the local population. The materials collected by the expedition also included a report from a group of American scientists who had visited the region earlier. The report states that one of the Americans, who was digging in the sand with an iron bar, was suddenly killed by accidentally touching a death worm in the sand.
If this story is true, then the only thing that can kill is an electric shock. All animals known today that generate electricity are fish that live in water - a good conductor of electricity. If the death worm does exist and kills with an electric shock, then most likely it generates electricity not inside, but outside itself by friction. This phenomenon is called triboelectricity and occurs when the outer surface of the worm (in this case, the worm should be covered with scales like reptiles) rubs against the sand at the moment of movement.