The idea of finding intelligent life elsewhere in our solar system has largely been confined to science fiction stories and movies about Moon-dwelling Nazis. That has not always been the case, though. For decades, astronomers and theologians alike have claimed that they discovered or could rationalize proof of life on our planetary neighbors.
10.Franz von Paula Gruithuisen
In 1824, Franz von Paula Gruithuisen, a German astronomer and physician, published a paper with the hefty title, “Discovery of many distinct traces of lunar inhabitants, especially one of their colossal buildings.” In a series of papers spread out over 28 years, he defined what he believed to be a true lunar city near the crater called Schroter.
In numerous drawings, Gruithuisen interpreted what he saw through his telescope as artificially constructed buildings, waterways, and roads. He drew incredibly beautiful, detailed maps of the Moon’s surface, but most of his contemporaries dismissed his “Lunar City” claims as nonsense.