https://newstangail24.com/russian-scientists-stated-in-1970-that-moon-is-artificial-space-object/
The idea that the Moon is hollow on the interior isn’t new. H. G. Wells (1866–1946), recognized as the “Father of Science Fiction,” wrote of an epic journey to the Moon in his 1901 novel “The First Men in the Moon.” The novel’s characters are taken aback when they discover that the Moon is not what it appears to be from Earth. It is, in fact, hollow and home to a weird extraterrestrial culture.
For a work published in 1901, such fantasies were quite daring. The hypothesis of a hollow moon was further refined after people saw the Moon more than 60 years later.
What caused this to happen? Several seismographs were placed on the lunar surface by astronauts during lunar landings. These devices are used to record vibrations and movements.
Seismographs were left on the lunar surface to collect data on the Moon’s activity. The sensors used on the Apollo 11, 12, 14, 15, and 16 missions communicated data to Earth through a radio channel until 1977, when they were switched off due to financial constraints.