Believers in the theory that Earth has a hollow, inhabitable core sometimes also believe in evil creatures called the Deros, which were supposedly created through genetic engineering.
Resembling demons, these creatures supposedly visit the surface of the earth to kidnap human beings, whom they then subject to a variety of tortures. They also supposedly wreak de¬struction on the inhabitants of Earth's sur¬face by using technologically advanced ma¬chines hidden in caves to alter weather, alter brain waves to cause mental illness,and case industrial,traffic,and other accidents.
The idea of the Deros originated with Richard Sharpe Shaver, who, in 1943, told the editor of the magazine Amazing Stories that he had seen these beings; their name, he said, was derived from the words detri¬mental robots, though they were not actu¬ally robots but living creatures. According to Shaver,