8. The US Government Secretly Sent Astronauts To Another Planet
According to this conspiracy theory, the administration of President JFK—and, later, Johnson—allegedly sent astronauts to a faraway planet called Serpo. The ambitious project began after the US government supposedly saved the life of an alien whose spacecraft crashed in Roswell. In return, the grateful alien established an exchange program with the government and made arrangements for two spaceships to pick it up along with a dozen specially trained astronauts in 1965. After 37 light-years, the astronauts finally reached Serpo and spent more than a decade learning about the planet and its inhabitants, a race called Ebens.
According to them, the Ebens numbered more than 600,000 but lived in a peaceful, government-free community. After 13 years, the team finally returned to Earth four members short after two of them died and another two chose to stay on Serpo. Unfortunately, there are no surviving members of the team today, as all of them supposedly succumbed to the high radiation levels brought on by the two suns of Serpo.